Reply Obj. 1: Baptism opens the gates of the heavenly kingdom to the baptized in so far as it incorporates them in the Passion of Christ, by applying its power to man.
Reply Obj. 2: When Christ's Passion was not as yet consummated actually but only in the faith of believers, Baptism proportionately caused the gates to be opened, not in fact but in hope. For the baptized who died then looked forward, with a sure hope, to enter the heavenly kingdom.
Reply Obj. 3: The baptized are subject to death and the penalties of the present life, not by reason of a personal debt of punishment but by reason of the state of their nature. And therefore this is no bar to their entrance to the heavenly kingdom, when death severs the soul from the body; since they have paid, as it were, the debt of nature. _______________________
EIGHTH ARTICLE [III, Q. 69, Art. 8]
Whether Baptism Has an Equal Effect in All?
Objection 1: It seems that Baptism has not an equal effect in all. For the effect of Baptism is to remove guilt. But in some it takes away more sins than in others; for in children it takes away only original sins, whereas in adults it takes away actual sins, in some many, in others few. Therefore Baptism has not an equal effect in all.
Obj. 2: Further, grace and virtues are bestowed on man by Baptism. But some, after Baptism, seem to have more grace and more perfect virtue than others who have been baptized. Therefore Baptism has not an equal effect in all.
Obj. 3: Further, nature is perfected by grace, as matter by form. But a form is received into matter according to its capacity. Therefore, since some of the baptized, even children, have greater capacity for natural gifts than others have, it seems that some receive greater grace than others.
Obj. 4: Further, in Baptism some receive not only spiritual, but also bodily health; thus Constantine was cleansed in Baptism from leprosy. But all the infirm do not receive bodily health in Baptism. Therefore it has not an equal effect in all.
On the contrary, It is written (Eph. 4:5): "One Faith, one Baptism." But a uniform cause has a uniform effect. Therefore Baptism has an equal effect in all.