2 Corinthians 10:17-18 “Let the one who boasts, boast in the Lord.” For it is not the one who commends himself who is approved, but the one whom the Lord commends.
Paul is defending his ministry against false teachers who are self-promoting. Paul concludes by telling the Corinthians that all the credit belongs to Jesus and our speech should glorify the Lord. The approval we should seek is that of the Lord, not our own or someone else of the world.
Where is my mindset when I am serving as an individual, representing the Church or a mission organization? My mind need to be focused on Jesus, acting as a humble servant. My speech needs to direct people to Jesus and the saving power of the gospel. If I live where I put myself out in front of Christ or have to create a persona that lifts me up, I am missing the gospel message. My identity is to be found in Christ, to love serve and honor Him. When I love, serve and give the glory to God not self, I will be in Christ.