I answer that, In this sacrament, as stated above (AA. 1, 4), the Holy Ghost is given to the baptized for strength: just as He was given to the apostles on the day of Pentecost, as we read in Acts 2; and just as He was given to the baptized by the imposition of the apostles' hands, as related in Acts 8:17. Now it has been proved in the First Part (Q. 43, A. 3) that the Holy Ghost is not sent or given except with sanctifying grace. Consequently it is evident that sanctifying grace is bestowed in this sacrament.
Reply Obj. 1: Sanctifying grace does indeed take away sin; but it has other effects also, because it suffices to carry man through every step as far as eternal life. Hence to Paul was it said (2 Cor. 12:9): "My grace is sufficient for thee": and he says of himself (1 Cor. 15:10): "By the grace of God I am what I am." Therefore sanctifying grace is given not only for the remission of sin, but also for growth and stability in righteousness. And thus is it bestowed in this sacrament.
Reply Obj. 2: Further, as appears from its very name, this sacrament is given in order "to confirm" what it finds already there. And consequently it should not be given to those who are not in a state of grace. For this reason, just as it is not given to the unbaptized, so neither should it be given to the adult sinners, except they be restored by Penance. Wherefore was it decreed in the Council of Orleans (Can. iii) that "men should come to Confirmation fasting; and should be admonished to confess their sins first, so that being cleansed they may be able to receive the gift of the Holy Ghost." And then this sacrament perfects the effects of Penance, as of Baptism: because by the grace which he has received in this sacrament, the penitent will obtain fuller remission of his sin. And if any adult approach, being in a state of sin of which he is not conscious or for which he is not perfectly contrite, he will receive the remission of his sins through the grace bestowed in this sacrament.
Reply Obj. 3: As stated above (Q. 62, A. 2), the sacramental grace adds to the sanctifying grace taken in its wide sense, something that produces a special effect, and to which the sacrament is ordained. If, then, we consider, in its wide sense, the grace bestowed in this sacrament, it does not differ from that bestowed in Baptism, but increases what was already there. On the other hand, if we consider it as to that which is added over and above, then one differs in species from the other. _______________________
EIGHTH ARTICLE [III, Q. 72, Art. 8]
Whether This Sacrament Should Be Given to All?
Objection 1: It seems that this sacrament should not be given to all. For this sacrament is given in order to confer a certain excellence, as stated above (A. 11, ad 2). But all are not suited for that which belongs to excellence. Therefore this sacrament should not be given to all.
Obj. 2: Further, by this sacrament man advances spiritually to perfect age. But perfect age is inconsistent with childhood. Therefore at least it should not be given to children.
Obj. 3: Further, as Pope Melchiades says (Ep. ad Episc. Hispan.) "after Baptism we are strengthened for the combat." But women are incompetent to combat, by reason of the frailty of their sex. Therefore neither should women receive this sacrament.
Obj. 4: Further, Pope Melchiades says (Ep. ad Episc. Hispan.): "Although the benefit of Regeneration suffices for those who are on the point of death, yet the graces of Confirmation are necessary for those who are to conquer. Confirmation arms and strengthens those to whom the struggles and combats of this world are reserved. And he who comes to die, having kept unsullied the innocence he acquired in Baptism, is confirmed by death; for after death he can sin no more." Therefore this sacrament should not be given to those who are on the point of death: and so it should not be given to all.