1 Thessalonians 1:5

"Knowing, brethren beloved of God, your election, how that our Gospel came not unto you in word only, but also in power, and in the Holy Ghost, and in much assurance; even as ye know what manner of men we showed ourselves among you for your sake." Knowing what? How "we showed ourselves among you"? Here he also touches upon his own good actions, but covertly. For he wishes first to enlarge upon their praises, and what he says is something of this sort. I knew that you were men of great and noble sort, that you were of the Elect. For this reason we also endure all things for your sake. For this, "what manner of men we showed ourselves among you," is the expression of one showing that with much zeal and much vehemence we were ready to give up our lives for your sake; and for this thanks are due not to us, but to you, because ye were elect. On this account also he says elsewhere, "And these things I endure for the Elect's sake." (2 Tim. ii. 10) For what would not one endure for the sake of God's beloved ones? And having spoken of his own part, he all but says, For if you were both beloved and elect, we suffer all things with reason. For not only did his praise of them confirm them, but his reminding them that they too themselves had displayed a fortitude corresponding to their zeal.