John Calvin on 2 Thessalonians 2:12

12 That all may be condemned. That is, that they may receive the punishment due to their impiety. Thus, those that perish have no just ground to expostulate with God, inasmuch as they have obtained what they sought. For we must keep in view what is stated in Deuteronomy 13:3, that the hearts of men are subjected to trial, when false doctrines come abroad, inasmuch as they have no power except among those who do not love God with a sincere heart. Let those, then, who take pleasure in unrighteousness, reap the fruit of it. When he says all, he means that contempt of God finds no excuse in the great crowd and multitude of those who refuse to obey the gospel, for God is the Judge of the whole world, so that he will inflict punishment upon a hundred thousand, no less than upon one individual.

The participle εὐδοκήσαντες (taking pleasure) means (so to speak) a voluntary inclination to evil, for in this way every excuse is cut off from the ungrateful, when they take so much pleasure in unrighteousness, as to prefer it to the righteousness of God. For by what violence will they say that they have been impelled to alienate themselves by a mad revolt “En se reuoltant malicieusement;” — “By revolting maliciously.” from God, towards whom they were led by the guidance of nature? It is at least manifest that they willingly and knowingly lent an ear to falsehoods.

2 Thessalonians 2:13-14

13. But we are bound to give thanks alway to God for you, brethren beloved of the Lord, because God hath from the beginning chosen you to salvation through sanctification of the Spirit and belief of the truth:

13. Nos autem debemus gratias agere Deo semper de vobis, fratres dilecti a Domino, quia elegit vos Deus ab initio in salutem, in sanctificatione Spiritus, et fide veritatis:

14. Whereunto he called you by our gospel, to the obtaining of the glory of our Lord Jesus Christ.

14. Quo vocavit vos per evangelium nostrum, in possessionem gloriae (vel, gloriosam) Domini nostri Iesu Christi.