But as God is true, our word toward you was not yea and nay.
All Commentaries on 2 Corinthians 1:18 Go To 2 Corinthians 1
John Chrysostom
AD 407
Paul had to explain why he could not keep his promise, so that the Corinthians would not distrust his preaching. In fact, what Paul preached was reliable. His promise to come to them had been from himself, but the message he proclaimed was from God, and God cannot lie.