Romans 15:17

Romans 15:17. have therefore my glorifying in Christ Jesus in things pertaining to God.

'in things pertaining to God' -(1 Corinthians 1:31; Jeremiah 2:23). 'Paul found personal gratification not in selfish goals and attainments but in preaching the gospel and in spiritual service.' (Green p. 16)

'Some to whom he was writing might think Paul had his nerve to write to them. After all, they weren't Paul's work. What was he doing "cashing in on" the work of others. Perhaps he's. glory-hunter. The reason Paul writes to them (and sometimes boldly) is not to butt in and gain glory. He was given. special commission by God to minister the word to Gentiles and this is what he is fulfilling (Romans 15:15-16)' (McGuiggan pp. 429-430)

Note: Paul didn't glory in Judaism, neither did he glory in the past. Rather, he took pride in what was being accomplished for Christ Jesus. After all, that's really the only important thing there is.