14 For we stretch not ourselves beyond our measure, as though we reached not unto you: for we are come as far as to you also in preaching the gospel of Christ:
Paul did not go too far in what he was doing but stayed within the limits set for his task by God. He makes this explicit here so that the Corinthians will know that God has sent him to them and so they ought to obey his warnings. Otherwise they might appear to be resisting God, by whom Paul was sent.
"For we stretch not ourselves overmuch, as though we reached not unto you: for we came even as far as unto you in preaching the Gospel of Christ."
Not simply 'we came,' but, 'we announced, we preached, we persuaded, we succeeded.' For it is probable that they having merely come to the disciples of the Apostles, ascribed the whole to themselves, from their bare presence among them. 'But not so we: nor can any one say that we were not able to come as far as to you, and that we stretched our boasting as far as to you in words only; for we also preached the word to you.'
[AD 384] Ambrosiaster on 2 Corinthians 10:14