1 Corinthians 9:16

'For if I preach the gospel, I have nothing to glory of, for necessity is laid on me. For woe is to me, if I preach not the gospel.'

But that is not to suggest that he has anything to glory of in doing so. He will not even glory in the fact that he preaches the Gospel. He will not take any credit for it. For he has nothing to glory of, in respect of himself, when he preaches the Gospel. He has no reason to feel proud or pleased with himself. Rather it is to him a divine necessity. If he did not preach the Gospel continually it would be a woe to him, something which would cause him grief and make him deserving of judgment, for it is his destiny, the very purpose for which he was born, and to which he was called (Acts 9:15), and he probably felt as Jeremiah did when he spoke of his message as being like a fire within him (Jeremiah 20:9 compare Amos 3:8). Thus he preached the Gospel because he had to, under divine command, and as a result of divine urgency within.