For if I preach the gospel, I have nothing to boast of, for I am under compulsion; for woe is me if I do not preach the gospel. For if I do this voluntarily, I have a reward; but if against my will, I have a stewardship entrusted to me. (9:16–18) Paul spoke of boasting in the Lord (1 Cor. 1:31), “boasting in things pertaining to God” (Rom. 15:17), and such. Even more often he spoke of rejoicing
1 Corinthians 9:16–18