2 Corinthians 1:18

As God is true to his promises, so he hath taught me to be true to mine. Some make these words not to be merely declarative of the truth of God, but a kind of an oath, or calling the God of truth to witness, that his word toward them; by which some understand the gospel, or the word which he had preached amongst them (and of that indeed he speaketh in the next verse); but to me it seemeth much less strained, to interpret Paul's word, in this verse, of that word of promise of which he had before spoken, the promise which he owned before that he had made them of his coming to them. That word, he saith, was not yea and nay, that is, he did not make it with a quite contrary intention; but when he promised, he faithfully intended to have justified his word, and indeed to have come; but the providence of God, to which all men are subjected, had otherwise ordered him and disposed of him; which was the cause why he had not yet been as good as his word. It is very observable, how careful this great apostle was to clear himself from any imputations of levity and falsehood; and it should teach us to be careful to maintain our reputation in the world for truth and steadiness.