Ephesians 3:8 & 9
Although I am less than the least of all God's people, this grace was given me: to preach to the Gentiles the unsearchable riches of Christ, and to make plain to everyone the administration of this mystery, which for ages past was kept hidden in God, who created all things.
Paul sums up his ministry here and he never strayed from God's calling on his life. He shows humility in saying that he is less than the least and knew that it was only a gift of God that allowed him to serve. His ministry was twofold in that he was to bring Gentiles to Christ and to explain to everyone how God brought Jews and Gentiles together into one body. When you serve, do you serve with the same attitude (humility and gratitude for the chance to serve)?