1 Thessalonians 2:12-13

to the end that ye should walk worthily of God, who calleth you into his own kingdom and glory. And for this cause we also thank God without ceasing, that, when ye received from us the word of the message, even the word of God, ye accepted it not as the word of men, but, as it is in truth, the word of God, which also worketh in you that believe.