Alright, here’s what the Church teaches about predestination:
- God predestines all the elect to heaven.
- God negatively reprobates (allows) people to go to hell.
- Man has free will.
Now, the difference with Protestantism is that protestants believe in double predestination, which means that God positively predestines (or reprobrate) people to hell. This is a no no.
The main debate on predestination is this…
God gives grace. There are two kinds…sufficient and efficacious. Sufficient is the ability to do please God and efficacious is to actually perform the act. For example, a fire has the ability to burn the wood. But unless someone puts the wood on fire, it will never be burned. The “putting the wood on fire” is the application, it is efficacious grace.
The controversy is…is grace efficacious because God foresees that man will not resist grace or is grace efficacious because God makes it efficacious?
The Thomist puts sovereignty on God’s will. God gives efficacious grace because He wants to. The Molinist says that God foresees what man will do with grace, and if man responds to it, pleasing God and not resisting it, then it is efficacious. In other words, to the Molinist, God predestines men to be saved because He foresaw it and to the Thomist, God foresees it because He predestines them.
My personal opinion leans toward Fr. Most’s theory on it. I think that thomists sometimes rely too heavily on metaphysics and molinists rely too heavily on merits of man rather than God’s sovereingty. I also think that the metaphysics of modality is helpful in this issue.