I answer that, As the Apostle says (Rom. 6:3, 4), "all we who are baptized in Christ Jesus, are baptized in His death: for we are buried together with Him, by Baptism unto death"; which is to say that by Baptism man is incorporated in the very death of Christ. Now it is manifest from what has been said above (Q. 48, AA. 2, 4; Q. 49, A. 3) that Christ's death satisfied sufficiently for sins, "not for ours only, but also for those of the whole world," according to 1 John 2:2. Consequently no kind of satisfaction should be enjoined on one who is being baptized, for any sins whatever: and this would be to dishonor the Passion and death of Christ, as being insufficient for the plenary satisfaction for the sins of those who were to be baptized.
Reply Obj. 1: As Augustine says in his book on Infant Baptism (De Pecc. Merit. et Remiss. i), "the effect of Baptism is to make those, who are baptized, to be incorporated in Christ as His members." Wherefore the very pains of Christ were satisfactory for the sins of those who were to be baptized; just as the pain of one member can be satisfactory for the sin of another member. Hence it is written (Isa. 53:4): "Surely He hath borne our infirmities and carried our sorrows."
Reply Obj. 2: Those who have been lately baptized should be drilled into righteousness, not by penal, but by "easy works, so as to advance to perfection by taking exercise, as infants by taking milk," as a gloss says on Ps. 130:2: "As a child that is weaned is towards his mother." For this reason did our Lord excuse His disciples from fasting when they were recently converted, as we read in Matt. 9:14, 15: and the same is written 1 Pet. 2:2: "As new-born babes desire . . . milk . . . that thereby you may grow unto salvation."
Reply Obj. 3: To restore what has been ill taken from one's neighbor, and to make satisfaction for wrong done to him, is to cease from sin: for the very fact of retaining what belongs to another and of not being reconciled to one's neighbor, is a sin. Wherefore those who are baptized should be enjoined to make satisfaction to their neighbor, as also to desist from sin. But they are not to be enjoined to suffer any punishment for past sins. _______________________
SIXTH ARTICLE [III, Q. 68, Art. 6]
Whether Sinners Who Are Going to Be Baptized Are Bound to Confess
Their Sins?
Objection 1: It seems that sinners who are going to be baptized are bound to confess their sins. For it is written (Matt. 3:6) that many "were baptized" by John "in the Jordan confessing their sins." But Christ's Baptism is more perfect than John's. Therefore it seems that there is yet greater reason why they who are about to receive Christ's Baptism should confess their sins.
Obj. 2: Further, it is written (Prov. 28:13): "He that hideth his sins, shall not prosper; but he that shall confess and forsake them, shall obtain mercy." Now for this is a man baptized, that he may obtain mercy for his sins. Therefore those who are going to be baptized should confess their sins.
Obj. 3: Further, Penance is required before Baptism, according to Acts 2:38: "Do penance and be baptized every one of you." But confession is a part of Penance. Therefore it seems that confession of sins should take place before Baptism.
On the contrary, Confession of sins should be sorrowful: thus Augustine says (De Vera et Falsa Poenit. xiv): "All these circumstances should be taken into account and deplored." Now, as Ambrose says on Rom. 11:29, "the grace of God requires neither sighs nor groans in Baptism." Therefore confession of sins should not be required of those who are going to be baptized.