Here is the link to the Aquinas quote if any wonders where I am getting my sources:
ccel.org/ccel/aquinas/nature_grace.viii.v.vii.html
Aquinas is saying that the transfer from the Kingdom of darkness to that of lift happens instantly. Here is just an excerpt that can be found in the above link:
the justification of the ungodly in its entirety has its origin in the infusion of grace. The free will is moved by grace, and guilt is removed by grace. Now the infusion of grace takes place in an instant, without any succession. For if any form is 195not imprinted on its subject suddenly, the reason is that its subject is not disposed to it, and that the agent needs time to make it so. Hence we see that a substantial form is received by matter at once, whenever matter becomes disposed to it through preliminary alteration. Hence also the atmosphere is at once illuminated by a body which is actually bright, since it is of its own accord disposed to receive light. Now we have already said that God needs no disposition, other than that which he himself creates, in order to infuse grace into the soul. As we said in Q. 112, Art. 2, he sometimes creates a disposition sufficient for the reception of grace all at once, sometimes by gradual degrees. A natural agent cannot adapt matter in an instant, because there is something in matter which resists his power. Matter is consequently adapted the more quickly the stronger is the power of the agent, as we may observe. The divine power can therefore adapt any created matter whatsoever instantly to its form, since the divine power is infinite. Much more can it so adapt the free will, the movement of which can be instantaneous by nature. The justification of the ungodly is therefore achieved by God in an instant.
I just want to compare this with the following quote from Trent to those who might accuse me if straying off topic and not dealing with catholic sources:
This disposition, or preparation, is followed by Justification itself, which is not remission of sins merely, but also the sanctification and renewal of the inward man, through the voluntary reception of the grace, and of the gifts, whereby man of unjust becomes just, and of an enemy a friend, that so he may be an heir according to hope of life everlasting.
Of this Justification the causes are these: the final cause indeed is the glory of God and of Jesus Christ, and life everlasting; while the efficient cause is a merciful God who washes and sanctifies gratuitously, signing, and anointing with the holy Spirit of promise, who is the pledge of our inheritance; but the meritorious cause is His most beloved only-begotten, our Lord Jesus Christ, who, when we were enemies, for the exceeding charity wherewith he loved us, merited Justification for us by His most holy Passion on the wood of the cross, and made satisfaction for us unto God the Father; the instru-[Page 35]mental cause is the sacrament of baptism, which is the sacrament of faith, without which (faith) no man was ever justified; lastly, the alone formal cause is the justice of God, not that whereby He Himself is just, but that whereby He maketh us just, that, to wit, with which we being endowed by Him, are renewed in the spirit of our mind, and we are not only reputed, but are truly called, and are, just, receiving justice within us, each one according to his own measure, which the Holy Ghost distributes to every one as He wills, and according to each one’s proper disposition and co-operation. For, although no one can be just, but he to whom the merits of the Passion of our Lord Jesus Christ are communicated, yet is this done in the said justification of the impious, when by the merit of that same most holy Passion, the charity of God is poured forth, by the Holy Spirit, in the hearts of those that are justified, and is inherent therein: whence, man, through Jesus Christ, in whom he is ingrafted, receives, in the said justification, together with the remission of sins, all these (gifts) infused at once, faith, hope, and charity. For faith, unless hope and charity be added thereto, neither unites man perfectly with Christ, nor makes him a living member of His body. For which reason it is most truly said, that Faith without works is dead and profitless; and, In Christ Jesus neither circumcision, availeth anything, nor uncircumcision, but faith which worketh by charity. This faith, Catechumen’s beg of the Church-agreeably to a tradition of the apostles-previously to the sacrament of Baptism; when they beg for the faith which bestows life everlasting, which, without hope and charity, faith cannot bestow: whence also do they immediately hear that word of Christ; If thou wilt enter into life, keep the commandments. Wherefore, when receiving true and Christian justice, they are bidden, immediately on being born again, to preserve it pure and spotless, as the first robe given them through Jesus Christ in lieu of that which [Page 36] Adam, by his disobedience, lost for himself and for us, that so they may bear it before the judgment-seat of our Lord Jesus Christ, and may have life everlasting.
Those anyone see any harmony with the quote from Trent and that from Aquinas?