Aquinas specifically says that things cannot fall to turn out how God wanted them to. Are you saying that whole article is mistranslated? I had a thread earlier this month in which I quoted Aquinas again and again saying that eternal punishment is an essential part in God’s plan
Not that the whole article is mistranslated: I do think however, that the Fathers of the English Dominican Province heavily favored the interpretation of Thomas de Vio (Cajetan) and Domingo Bañez. (This is natural enough, since both were Dominicans.)
The first thing to keep in mind is that Thomas defines
praedestinatio as a
ratio:
Unde manifestum est quod praedestinatio est quaedam ratio ordinis aliquorum in salutem aeternam, in mente divina existens (
Summa theologiae, I, q.23, a. 2).
Therefore, it is evident that predestination is a type of knowledge, existing in the Divine Mind, of the ordering of some persons to eternal salvation (my translation).
That means that predestination, for Thomas, is an act of the Divine Intellect, not of the Divine Will. (It is knowledge on His part, not a decision.)
Of course, I concede the point that, when God does something, it produces its effect infallibly. I don’t think there can be any argument here.
Where I differ with some interpreters of St. Thomas regards what it is, precisely, that God does when He gives us actual grace.
Both Bañez and Luis de Molina, the great adversaries of the
De auxiliis controversy, assumed that actual graces produce
acts of the will in us. (Without getting into detail, this has a lot to do with their metaphysical presuppositions, which they borrowed from Cajetan: they thought that substances could not produce their own actions, but could only be pre-disposed so that God could produce those actions in them.) Hence, according to them (especially Bañez), when God gives an efficacious grace, he practically constrains our wills to perform a certain action (e.g., to repent of a mortal sin, to seek Baptism, or what have you).
In reality, what actual graces produce is the
capacity to act in a certain way. This is possible, because our actions really do spring forth from our act of being, or existence. Putting that capacity to good use is, however, entirely up to the person who has received it.
When God gives us an actual grace, does the grace produce its effect infallibly? Yes, absolutely. But its infallible effect is to
increase our capacity to act, not to restrict it. We remain completely free to make good use of that capacity or not.