For this cause also thank we God without ceasing, because, when you received the word of God which you heard of us, you received it not as the word of men, but as it is in truth, the word of God, which effectually works also in you that believe.
All Commentaries on 1 Thessalonians 2:13 Go To 1 Thessalonians 2
Augustine of Hippo
AD 430
Is it not apparently the beginning of the Thessalonians’ faith for which this same apostle thanks God, when he says, “Therefore, we also give thanks to God without ceasing, because when you had received the word which you heard from us, you received it not as the word of men, but (as it truly is) the word of God, which works in you, in which you have believed”? Why does he give thanks here to God? Certainly, it would be vain and meaningless if the person to whom he gives thanks for something is not the person who did it. But since this is not vain and meaningless, then certainly God, to whom he gives thanks for this work, is the one who brought it about that the Thessalonians, when they had received from the apostle the word by hearing it, received it not as the word of men but, as it truly is, as the word of God. Therefore, God works in the hearts of men, by that calling which is according to his purpose and of which we have said much, so that they would not hear the gospel in vain.