Calvinism teaches double predestination. That’s the idea that God selects people who will be condemned to hell and people who will be glorified in heaven, from before the beginning of time. That’s why its called double predestination.
- Those predestined to hell.
- Those predestined to heaven.
The Catholic Church Teaches that God predestines all men to heaven.
1 Timothy 2:4 who wills everyone to be saved and to come to knowledge of the truth.
But each man has to live his life.
Deuteronomy 30:19 I call heaven and earth today to witness against you: I have set before you life and death, the blessing and the curse. Choose life, then, that you and your descendants may live,
During their life, some men can become wicked and lose their predestination to heaven. Since God knows everything. He knows whether these men will repent or not. If they will not repent, then God gives them what they want.
Exodus 7:13 Pharaoh, however, hardened his heart and would not listen to them, just as the Lord had foretold.
2 Thessalonians 2:11 Therefore, God is sending them a deceiving power so that they may believe the lie, 12 that all who have not believed the truth but have approved wrongdoing may be condemned.
Some people give signs of their predestination to heaven during their life. Many of them are canonized Saints.
And finally, a major part of the Catholic Teaching is that, God knows who is going to heaven and who is going to hell. But we don’t. Therefore, we are free to seek heaven with all our hearts.
Anyway, that’s the way I understand it.
600 To God, all moments of time are present in their immediacy. When therefore he establishes his eternal plan of “predestination”, he includes in it each person’s free response to his grace: “In this city, in fact, both Herod and Pontius Pilate, with the Gentiles and the peoples of Israel, gathered together against your holy servant Jesus, whom you anointed, to do whatever your hand and your plan had predestined to take place.” For the sake of accomplishing his plan of salvation, God permitted the acts that flowed from their blindness.