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Summa Theologica

Whether man is preserved by this sacrament from future sins?

Objection 1: It seems that man is not preserved by this sacrament from future sins. For there are many that receive this sacrament worthily, who afterwards fall into sin. Now this would not happen if this sacrament were to preserve them from future sins. Consequently, it is not an effect of this sacrament to preserve from future sins.

Objection 2: Further, the Eucharist is the sacrament of charity, as stated above(A[4]). But charity does not seem to preserve from future sins, because it can be lost through sin after one has possessed it, as was stated in the SS, Q[24], A[11]. Therefore it seems that this sacrament does not preserve man from sin.

Objection 3: Further, the origin of sin within us is "the law of sin, which is in our members," as declared by the Apostle (Rom. 7:23). But the lessening of the fomes, which is the law of sin, is set down as an effect not of this sacrament, but rather of Baptism. Therefore preservation from sin is not an effect of this sacrament.

On the contrary, our Lord said (Jn. 6:50): "This is the bread which cometh down from heaven; that if any man eat of it, he may not die": which manifestly is not to be understood of the death of the body. Therefore it is to be understood that this sacrament preserves from spiritual death, which is through sin.

I answer that, Sin is the spiritual death of the soul. Hence man is preserved from future sin in the same way as the body is preserved from future death of the body: and this happens in two ways. First of all, in so far as man's nature is strengthened inwardly against inner decay, and so by means of food and medicine he is preserved from death. Secondly, by being guarded against outward assaults; and thus he is protected by means of arms by which he defends his body.

Now this sacrament preserves man from sin in both of these ways. For, first of all, by uniting man with Christ through grace, it strengthens his spiritual life, as spiritual food and spiritual medicine, according to Ps. 103:5: "(That) bread strengthens [Vulg.: 'may strengthen'] man's heart." Augustine likewise says (Tract. xxvi in Joan.): "Approach without fear; it is bread, not poison." Secondly, inasmuch as it is a sign of Christ's Passion, whereby the devils are conquered, it repels all the assaults of demons. Hence Chrysostom says (Hom. xlvi in Joan.): "Like lions breathing forth fire, thus do we depart from that table, being made terrible to the devil."

Reply to Objection 1: The effect of this sacrament is received according to man's condition: such is the case with every active cause in that its effect is received in matter according to the condition of the matter. But such is the condition of man on earth that his free-will can be bent to good or evil. Hence, although this sacrament of itself has the power of preserving from sin, yet it does not take away from man the possibility of sinning.

Reply to Objection 2: Even charity of itself keeps man from sin, according to Rom. 13:10: "The love of our neighbor worketh no evil": but it is due to the mutability of free-will that a man sins after possessing charity, just as after receiving this sacrament.

Reply to Objection 3: Although this sacrament is not ordained directly to lessen the fomes, yet it does lessen it as a consequence, inasmuch as it increases charity, because, as Augustine says (Q[83]), "the increase of charity is the lessening of concupiscence." But it directly strengthens man's heart in good; whereby he is also preserved from sin.

Whether this sacrament benefit others besides the recipients?

Objection 1: It seems that this sacrament benefits only the recipients. For this sacrament is of the same genus as the other sacraments, being one of those into which that genus is divided. But the other sacraments only benefit the recipients; thus the baptized person alone receives effect of Baptism. Therefore, neither does this sacrament benefit others than the recipients.

Objection 2: Further, the effects of this sacrament are the attainment of grace and glory, and the forgiveness of sin, at least of venial sin. If therefore this sacrament were to produce its effects in others besides the recipients, a man might happen to acquire grace and glory and forgiveness of sin without doing or receiving anything himself, through another receiving or offering this sacrament.

Objection 3: Further, when the cause is multiplied, the effect is likewise multiplied. If therefore this sacrament benefit others besides the recipients, it would follow that it benefits a man more if he receive this sacrament through many hosts being consecrated in one mass, whereas this is not the Church's custom: for instance, that many receive communion for the salvation of one individual. Consequently, it does not seem that this sacrament benefits anyone but the recipient.

On the contrary, Prayer is made for many others during the celebration of this sacrament; which would serve no purpose were the sacrament not beneficial to others. Therefore, this sacrament is beneficial not merely to them who receive it.

I answer that, As stated above(A[3]), this sacrament is not only a sacrament, but also a sacrifice. For, it has the nature of a sacrifice inasmuch as in this sacrament Christ's Passion is represented, whereby Christ "offered Himself a Victim to God" (Eph. 5:2), and it has the nature of a sacrament inasmuch as invisible grace is bestowed in this sacrament under a visible species. So, then, this sacrament benefits recipients by way both of sacrament and of sacrifice, because it is offered for all who partake of it. For it is said in the Canon of the Mass: "May as many of us as, by participation at this Altar, shall receive the most sacred body and blood of Thy Son, be filled with all heavenly benediction and grace."

But to others who do not receive it, it is beneficial by way of sacrifice, inasmuch as it is offered for their salvation. Hence it is said in the Canon of the Mass: "Be mindful, O Lord, of Thy servants, men and women... for whom we offer, or who offer up to Thee, this sacrifice of praise for themselves and for all their own, for the redemption of their souls, for the hope of their safety and salvation." And our Lord expressed both ways, saying (Mat. 26:28, with Lk. 22:20): "Which for you," i.e. who receive it, "and for many," i.e. others, "shall be shed unto remission of sins."

Reply to Objection 1: This sacrament has this in addition to the others, that it is a sacrifice: and therefore the comparison fails.

Reply to Objection 2: As Christ's Passion benefits all, for the forgiveness of sin and the attaining of grace and glory, whereas it produces no effect except in those who are united with Christ's Passion through faith and charity, so likewise this sacrifice, which is the memorial of our Lord's Passion, has no effect except in those who are united with this sacrament through faith and charity. Hence Augustine says to Renatus (De Anima et ejus origine i): "Who may offer Christ's body except for them who are Christ's members?" Hence in the Canon of the Mass no prayer is made for them who are outside the pale of the Church. But it benefits them who are members, more or less, according to the measure of their devotion.

Reply to Objection 3: Receiving is of the very nature of the sacrament, but offering belongs to the nature of sacrifice: consequently, when one or even several receive the body of Christ, no help accrues to others. In like fashion even when the priest consecrates several hosts in one mass, the effect of this sacrament is not increased, since there is only one sacrifice; because there is no more power in several hosts than in one, since there is only one Christ present under all the hosts and under one. Hence, neither will any one receive greater effect from the sacrament by taking many consecrated hosts in one mass. But the oblation of the sacrifice is multiplied in several masses, and therefore the effect of the sacrifice and of the sacrament is multiplied.

Whether the effect of this sacrament is hindered by venial sin?

Objection 1: It seems that the effect of this sacrament is not hindered by venial sin. For Augustine (Tract. xxvi in Joan.), commenting on Jn. 6:52, "If any man eat of this bread," etc., says: "Eat the heavenly bread spiritually; bring innocence to the altar; your sins, though they be daily, let them not be deadly." From this it is evident that venial sins, which are called daily sins, do not prevent spiritual eating. But they who eat spiritually, receive the effect of this sacrament. Therefore, venial sins do not hinder the effect of this sacrament.

Objection 2: Further, this sacrament is not less powerful than Baptism. But, as stated above (Q[69], AA,10), only pretense checks the effect of Baptism, and venial sins do not belong to pretense; because according to Wis. 1:5: "the Holy Spirit of discipline will flee from the deceitful," yet He is not put to flight by venial sins. Therefore neither do venial sins hinder the effect of this sacrament.

Objection 3: Further, nothing which is removed by the action of any cause, can hinder the effect of such cause. But venial sins are taken away by this sacrament. Therefore, they do not hinder its effect.

On the contrary, Damascene says (De Fide Orth. iv): "The fire of that desire which is within us, being kindled by the burning coal," i.e. this sacrament, "will consume our sins, and enlighten our hearts, so that we shall be inflamed and made godlike." But the fire of our desire or love is hindered by venial sins, which hinder the fervor of charity, as was shown in the FS, Q[81], A[4]; SS, Q[24], A[10]. Therefore venial sins hinder the effect of this sacrament.

I answer that, Venial sins can be taken in two ways: first of all as past, secondly as in the act of being committed. Venial sins taken in the first way do not in any way hinder the effect of this sacrament. For it can come to pass that after many venial sins a man may approach devoutly to this sacrament and fully secure its effect. Considered in the second way venial sins do not utterly hinder the effect of this sacrament, but merely in part. For, it has been stated above(A[1]), that the effect of this sacrament is not only the obtaining of habitual grace or charity, but also a certain actual refreshment of spiritual sweetness: which is indeed hindered if anyone approach to this sacrament with mind distracted through venial sins; but the increase of habitual grace or of charity is not taken away.

Reply to Objection 1: He that approaches this sacrament with actual venial sin, eats spiritually indeed, in habit but not in act: and therefore he shares in the habitual effect of the sacrament, but not in its actual effect.

Reply to Objection 2: Baptism is not ordained, as this sacrament is, for the fervor of charity as its actual effect. Because Baptism is spiritual regeneration, through which the first perfection is acquired, which is a habit or form; but this sacrament is spiritual eating, which has actual delight.

Reply to Objection 3: This argument deals with past venial sins, which are taken away by this sacrament.

OF THE USE OR RECEIVING OF THIS SACRAMENT IN GENERAL (TWELVE ARTICLES)

We have now to consider the use or receiving of this sacrament, first of all in general; secondly, how Christ used this sacrament.

Under the first heading there are twelve points of inquiry:

(1) Whether there are two ways of eating this sacrament, namely, sacramentally and spiritually?

(2) Whether it belongs to man alone to eat this sacrament spiritually?

(3) Whether it belongs to the just man only to eat it sacramentally?

(4) Whether the sinner sins in eating it sacramentally?

(5) Of the degree of this sin;

(6) Whether this sacrament should be refused to the sinner that approaches it?

(7) Whether nocturnal pollution prevents man from receiving this sacrament?

(8) Whether it is to be received only when one is fasting?

(9) Whether it is to be given to them who lack the use of reason?

(10) Whether it is to be received daily?

(11) Whether it is lawful to refrain from it altogether?

(12) Whether it is lawful to receive the body without the blood?

Whether there are two ways to be distinguished of eating Christ's body?

Objection 1: It seems that two ways ought not to be distinguished of eating Christ's body, namely, sacramentally and spiritually. For, as Baptism is spiritual regeneration, according to Jn. 3:5: "Unless a man be born again of water and the Holy Ghost," etc., so also this sacrament is spiritual food: hence our Lord, speaking of this sacrament, says (Jn. 6:64): "The words that I have spoken to you are spirit and life." But there are no two distinct ways of receiving Baptism, namely, sacramentally and spiritually. Therefore neither ought this distinction to be made regarding this sacrament.

Objection 2: Further, when two things are so related that one is on account of the other, they should not be put in contra-distinction to one another, because the one derives its species from the other. But sacramental eating is ordained for spiritual eating as its end. Therefore sacramental eating ought not to be divided in contrast with spiritual eating.

Objection 3: Further, things which cannot exist without one another ought not to be divided in contrast with each other. But it seems that no one can eat spiritually without eating sacramentally; otherwise the fathers of old would have eaten this sacrament spiritually. Moreover, sacramental eating would be to no purpose, if the spiritual eating could be had without it. Therefore it is not right to distinguish a twofold eating, namely, sacramental and spiritual.

On the contrary, The gloss says on 1 Cor. 11:29: "He that eateth and drinketh unworthily," etc.: "We hold that there are two ways of eating, the one sacramental, and the other spiritual."

I answer that, There are two things to be considered in the receiving of this sacrament, namely, the sacrament itself, and its fruits, and we have already spoken of both (QQ,79). The perfect way, then, of receiving this sacrament is when one takes it so as to partake of its effect. Now, as was stated above (Q[79], AA,8), it sometimes happens that a man is hindered from receiving the effect of this sacrament; and such receiving of this sacrament is an imperfect one. Therefore, as the perfect is divided against the imperfect, so sacramental eating, whereby the sacrament only is received without its effect, is divided against spiritual eating, by which one receives the effect of this sacrament, whereby a man is spiritually united with Christ through faith and charity.

Reply to Objection 1: The same distinction is made regarding Baptism and the other sacraments: for, some receive the sacrament only, while others receive the sacrament and the reality of the sacrament. However, there is a difference, because, since the other sacraments are accomplished in the use of the matter, the receiving of the sacrament is the actual perfection of the sacrament; whereas this sacrament is accomplished in the consecration of the matter: and consequently both uses follow the sacrament. On the other hand, in Baptism and in the other sacraments that imprint a character, they who receive the sacrament receive some spiritual effect, that is, the character. which is not the case in this sacrament. And therefore, in this sacrament, rather than in Baptism, the sacramental use is distinguished from the spiritual use.

Reply to Objection 2: That sacramental eating which is also a spiritual eating is not divided in contrast with spiritual eating, but is included under it; but that sacramental eating which does not secure the effect, is divided in contrast with spiritual eating; just as the imperfect, which does not attain the perfection of its species, is divided in contrast with the perfect.

Reply to Objection 3: As stated above (Q[73], A[3]), the effect of the sacrament can be secured by every man if he receive it in desire, though not in reality. Consequently, just as some are baptized with the Baptism of desire, through their desire of baptism, before being baptized in the Baptism of water; so likewise some eat this sacrament spiritually ere they receive it sacramentally. Now this happens in two ways. First of all, from desire of receiving the sacrament itself, and thus are said to be baptized, and to eat spiritually, and not sacramentally, they who desire to receive these sacraments since they have been instituted. Secondly, by a figure: thus the Apostle says (1 Cor. 10:2), that the fathers of old were "baptized in the cloud and in the sea," and that "they did eat... spiritual food, and... drank... spiritual drink." Nevertheless sacramental eating is not without avail, because the actual receiving of the sacrament produces more fully the effect of the sacrament than does the desire thereof, as stated above of Baptism (Q[69], A[4], ad 2).

Whether it belongs to man alone to eat this sacrament spiritually?

Objection 1: It seems that it does not belong to man alone to eat this sacrament spiritually, but likewise to angels. Because on Ps. 77:25: "Man ate the bread of angels," the gloss says: "that is, the body of Christ, Who i's truly the food of angels." But it would not be so unless the angels were to eat Christ spiritually. Therefore the angels eat Christ spiritually.

Objection 2: Further, Augustine (Tract. xxvi in Joan.) says: By "this meat and drink, He would have us to understand the fellowship of His body and members, which is the Church in His predestinated ones." But not only men, but also the holy angels belong to that fellowship. Therefore the holy angels eat of it spiritually.

Objection 3: Further, Augustine in his book De Verbis Domini (Serm. cxlii) says: "Christ is to be eaten spiritually, as He Himself declares: 'He that eateth My flesh and drinketh My blood, abideth in Me, and I in him.'" But this belongs not only to men, but also to the holy angels, in whom Christ dwells by charity, and they in Him. Consequently, it seems that to eat Christ spiritually is not for men only, but also for the angels.

On the contrary, Augustine (Tract. xxvi in Joan.) says: "Eat the bread" of the altar "spiritually; take innocence to the altar." But angels do not approach the altar as for the purpose of taking something therefrom. Therefore the angels do not eat spiritually.

I answer that, Christ Himself is contained in this sacrament, not under His proper species, but under the sacramental species. Consequently there are two ways of eating spiritually. First, as Christ Himself exists under His proper species, and in this way the angels eat Christ spiritually inasmuch as they are united with Him in the enjoyment of perfect charity, and in clear vision (and this is the bread we hope for in heaven), and not by faith, as we are united with Him here.

In another way one may eat Christ spiritually, as He is under the sacramental species, inasmuch as a man believes in Christ, while desiring to receive this sacrament; and this is not merely to eat Christ spiritually, but likewise to eat this sacrament; which does not fall to the lot of the angels. And therefore although the angels feed on Christ spiritually, yet it does not belong to them to eat this sacrament spiritually.

Reply to Objection 1: The receiving of Christ under this sacrament is ordained to the enjoyment of heaven, as to its end, in the same way as the angels enjoy it; and since the means are gauged by the end, hence it is that such eating of Christ whereby we receive Him under this sacrament, is, as it were, derived from that eating whereby the angels enjoy Christ in heaven. Consequently, man is said to eat the "bread of angels," because it belongs to the angels to do so firstly and principally, since they enjoy Him in his proper species; and secondly it belongs to men, who receive Christ under this sacrament.

Reply to Objection 2: Both men and angels belong to the fellowship of His mystical body; men by faith, and angels by manifest vision. But the sacraments are proportioned to faith, through which the truth is seen "through a glass" and "in a dark manner." And therefore, properly speaking, it does not belong to angels, but to men, to eat this sacrament spiritually.

Reply to Objection 3: Christ dwells in men through faith, according to their present state, but He is in the blessed angels by manifest vision. Consequently the comparison does not hold, as stated above (ad 2).

Whether the just man alone may eat Christ sacramentally?

Objection 1: It seems that none but the just man may eat Christ sacramentally. For Augustine says in his book De Remedio Penitentiae (cf. Tract. in Joan. xxv, n. 12; xxvi, n. 1): "Why make ready tooth and belly? Believe, and thou hast eaten... For to believe in Him, this it is, to eat the living bread." But the sinner does not believe in Him; because he has not living faith, to which it belongs to believe "in God," as stated above in the SS, Q[2], A[2]; SS, Q[4], A[5]. Therefore the sinner cannot eat this sacrament, which is the living bread.

Objection 2: Further, this sacrament is specially called "the sacrament of charity," as stated above (Q[78], A[3], ad 6). But as unbelievers lack faith, so all sinners lack charity. Now unbelievers do not seem to be capable of eating this sacrament, since in the sacramental form it is called the "Mystery of Faith." Therefore, for like reason, the sinner cannot eat Christ's body sacramentally.

Objection 3: Further, the sinner is more abominable before God than the irrational creature: for it is said of the sinner (Ps. 48:21): "Man when he was in honor did not understand; he hath been compared to senseless beasts, and made like to them." But an irrational animal, such as a mouse or a dog, cannot receive this sacrament, just as it cannot receive the sacrament of Baptism. Therefore it seems that for the like reason neither may sinners eat this sacrament.

On the contrary, Augustine (Tract. xxvi in Joan.), commenting on the words, "that if any man eat of it he may not die," says: "Many receive from the altar, and by receiving die: whence the Apostle saith, 'eateth and drinketh judgment to himself.'" But only sinners die by receiving. Therefore sinners eat the body of Christ sacramentally, and not the just only.

I answer that, In the past, some have erred upon this point, saying that Christ's body is not received sacramentally by sinners; but that directly the body is touched by the lips of sinners, it ceases to be under the sacramental species.

But this is erroneous; because it detracts from the truth of this sacrament, to which truth it belongs that so long as the species last, Christ's body does not cease to be under them, as stated above (Q[76], A[6], ad 3; Q[77], A[8]). But the species last so long as the substance of the bread would remain, if it were there, as was stated above (Q[77], A[4]). Now it is clear that the substance of bread taken by a sinner does not at once cease to be, but it continues until digested by natural heat: hence Christ's body remains just as long under the sacramental species when taken by sinners. Hence it must be said that the sinner, and not merely the just, can eat Christ's body.

Reply to Objection 1: Such words and similar expressions are to be understood of spiritual eating, which does not belong to sinners. Consequently, it is from such expressions being misunderstood that the above error seems to have arisen, through ignorance of the distinction between corporeal and spiritual eating.

Reply to Objection 2: Should even an unbeliever receive the sacramental species, he would receive Christ's body under the sacrament: hence he would eat Christ sacramentally, if the word "sacramentally" qualify the verb on the part of the thing eaten. But if it qualify the verb on the part of the one eating, then, properly speaking, he does not eat sacramentally, because he uses what he takes, not as a sacrament, but as simple food. Unless perchance the unbeliever were to intend to receive what the Church bestows; without having proper faith regarding the other articles, or regarding this sacrament.

Reply to Objection 3: Even though a mouse or a dog were to eat the consecrated host, the substance of Christ's body would not cease to be under the species, so long as those species remain, and that is, so long as the substance of bread would have remained; just as if it were to be cast into the mire. Nor does this turn to any indignity regarding Christ's body, since He willed to be crucified by sinners without detracting from His dignity; especially since the mouse or dog does not touch Christ's body in its proper species, but only as to its sacramental species. Some, however, have said that Christ's body would cease to be there, directly it were touched by a mouse or a dog; but this again detracts from the truth of the sacrament, as stated above. None the less it must not be said that the irrational animal eats the body of Christ sacramentally; since it is incapable of using it as a sacrament. Hence it eats Christ's body "accidentally," and not sacramentally, just as if anyone not knowing a host to be consecrated were to consume it. And since no genus is divided by an accidental difference, therefore this manner of eating Christ's body is not set down as a third way besides sacramental and spiritual eating.

Whether the sinner sins in receiving Christ's body sacramentally?

Objection 1: It seems that the sinner does not sin in receiving Christ's body sacramentally, because Christ has no greater dignity under the sacramental species than under His own. But sinners did not sin when they touched Christ's body under its proper species; nay, rather they obtained forgiveness of their sins, as we read in Lk. 7 of the woman who was a sinner; while it is written (Mat. 14:36) that "as many as touched the hem of His garment were healed." Therefore, they do not sin, but rather obtain salvation, by receiving the body of Christ.

Objection 2: Further, this sacrament, like the others, is a spiritual medicine. But medicine is given to the sick for their recovery, according to Mat. 9:12: "They that are in health need not a physician." Now they that are spiritually sick or infirm are sinners. Therefore this sacrament can be received by them without sin.

Objection 3: Further, this sacrament is one of our greatest gifts, since it contains Christ. But according to Augustine (De Lib. Arb. ii), the greatest gifts are those "which no one can abuse." Now no one sins except by abusing something. Therefore no sinner sins by receiving this sacrament.

Objection 4: Further, as this sacrament is perceived by taste and touch, so also is it by sight. Consequently, if the sinner sins by receiving the sacrament, it seems that he would sin by beholding it, which is manifestly untrue, since the Church exposes this sacrament to be seen and adored by all. Therefore the sinner does not sin by eating this sacrament.

Objection 5: Further, it happens sometimes that the sinner is unconscious of his sin. Yet such a one does not seem to sin by receiving the body of Christ, for according to this all who receive it would sin, as exposing themselves to danger, since the Apostle says (1 Cor. 4:4): "I am not conscious to myself of anything, yet I am not hereby justified." Therefore, the sinner, if he receive this sacrament, does not appear to be guilty of sin.

On the contrary, The Apostle says (1 Cor. 11:29): "He that eateth and drinketh unworthily, eateth and drinketh judgment to himself." Now the gloss says on this passage: "He eats and drinks unworthily who is in sin, or who handles it irreverently." Therefore, if anyone, while in mortal sin, receives this sacrament, he purchases damnation, by sinning mortally.

I answer that, In this sacrament, as in the others, that which is a sacrament is a sign of the reality of the sacrament. Now there is a twofold reality of this sacrament, as stated above (Q[73], A[6]): one which is signified and contained, namely, Christ Himself; while the other is signified but not contained, namely, Christ's mystical body, which is the fellowship of the saints. Therefore, whoever receives this sacrament, expresses thereby that he is made one with Christ, and incorporated in His members; and this is done by living faith, which no one has who is in mortal sin. And therefore it is manifest that whoever receives this sacrament while in mortal sin, is guilty of lying to this sacrament, and consequently of sacrilege, because he profanes the sacrament: and therefore he sins mortally.

Reply to Objection 1: When Christ appeared under His proper species, He did not give Himself to be touched by men as a sign of spiritual union with Himself, as He gives Himself to be received in this sacrament. And therefore sinners in touching Him under His proper species did not incur the sin of lying to Godlike things, as sinners do in receiving this sacrament.

Furthermore, Christ still bore the likeness of the body of sin; consequently He fittingly allowed Himself to be touched by sinners. But as soon as the body of sin was taken away by the glory of the Resurrection, he forbade the woman to touch Him, for her faith in Him was defective, according to Jn. 20:17: "Do not touch Me, for I am not yet ascended to My Father," i.e. "in your heart," as Augustine explains (Tract. cxxi in Joan.). And therefore sinners, who lack living faith regarding Christ are not allowed to touch this sacrament.

Reply to Objection 2: Every medicine does not suit every stage of sickness; because the tonic given to those who are recovering from fever would be hurtful to them if given while yet in their feverish condition. So likewise Baptism and Penance are as purgative medicines, given to take away the fever of sin; whereas this sacrament is a medicine given to strengthen, and it ought not to be given except to them who are quit of sin.

Reply to Objection 3: By the greatest gifts Augustine understands the soul's virtues, "which no one uses to evil purpose," as though they were principles of evil. Nevertheless sometimes a man makes a bad use of them, as objects of an evil use, as is seen in those who are proud of their virtues. So likewise this sacrament, so far as the sacrament is concerned, is not the principle of an evil use, but the object thereof. Hence Augustine says (Tract. lxii in Joan.): "Many receive Christ's body unworthily; whence we are taught what need there is to beware of receiving a good thing evilly... For behold, of a good thing, received evilly, evil is wrought": just as on the other hand, in the Apostle's case, "good was wrought through evil well received," namely, by bearing patiently the sting of Satan.

Reply to Objection 4: Christ's body is not received by being seen, but only its sacrament, because sight does not penetrate to the substance of Christ's body, but only to the sacramental species, as stated above (Q[76], A[7]). But he who eats, receives not only the sacramental species, but likewise Christ Himself Who is under them. Consequently, no one is forbidden to behold Christ's body, when once he has received Christ's sacrament, namely, Baptism: whereas the non-baptized are not to be allowed even to see this sacrament, as is clear from Dionysius (Eccl. Hier. vii). But only those are to be allowed to share in the eating who are united with Christ not merely sacramentally, but likewise really.

Reply to Objection 5: The fact of a man being unconscious of his sin can come about in two ways. First of all through his own fault, either because through ignorance of the law (which ignorance does not excuse him), he thinks something not to be sinful which is a sin, as for example if one guilty of fornication were to deem simple fornication not to be a mortal sin; or because he neglects to examine his conscience, which is opposed to what the Apostle says (1 Cor. 11:28): "Let a man prove himself, and so let him eat of that bread, and drink of the chalice." And in this way nevertheless the sinner who receives Christ's body commits sin, although unconscious thereof, because the very ignorance is a sin on his part.

Secondly, it may happen without fault on his part, as, for instance, when he has sorrowed over his sin, but is not sufficiently contrite: and in such a case he does not sin in receiving the body of Christ, because a man cannot know for certain whether he is truly contrite. It suffices, however, if he find in himself the marks of contrition, for instance, if he "grieve over past sins," and "propose to avoid them in the future" [*Cf. Rule of Augustine]. But if he be ignorant that what he did was a sinful act, through ignorance of the fact, which excuses, for instance, if a man approach a woman whom he believed to be his wife whereas she was not, he is not to be called a sinner on that account; in the same way if he has utterly forgotten his sin, general contrition suffices for blotting it out, as will be said hereafter (XP, Q[2], A[3], ad 2); hence he is no longer to be called a sinner.

Whether man is preserved by this sacrament from future sins? — Summa Theologica · Thomas Aquinas · Cloud of Witnesses