Romans 15:18-21
For I will not venture to speak of anything except what Christ has accomplished through me to bring the Gentiles to obedience—by word and deed, by the power of signs and wonders, by the power of the Spirit of God—so that from Jerusalem and all the way around to Illyricum I have fulfilled the ministry of the gospel of Christ; and thus I make it my ambition to preach the gospel, not where Christ has already been named, lest I build on someone else's foundation, but as it is written,
“Those who have never been told of him will see,
and those who have never heard will understand.”

C.S. Lewis described humility as, “not thinking less of yourself, but thinking of yourself less.” To be humble, we don’t have to see ourselves as having no value. The opposite is actually true! Paul has laid this case out to the Romans. Jesus created you in His image. Jesus paid the price for your sin. Jesus was crucified and raised so that you can be in His family. Jesus considers you, the Christian, as a joint heir with Him. Jesus shares His rule, His riches, and His Kingdom. You are valuable to Him.
Is Jesus valuable to you? If Jesus is valuable, you spend more time talking about Him than yourself. If Jesus is powerful, you talk about his deeds and power and less about yours. If Jesus is valuable, then you have ambition. Certainly, you have ambitions…to see your children grow and marry, to retire, or to have a house in the mountains or on the beach. Those ambitions are great. But they pale in comparison to the ambition a Jesus fills you with. You become ambitious for the Gospel.
Those that are enamored with Christ are ambitious for the Gospel. You know Jesus’ power and the power of His good news. You are ambitious, because if you aren’t, then the eternity of those around you end in wrath and not love. That ambition for Jesus will take you to places you never imagined. In turn, that Godly ambition will lead others to the place they never imagined- Christ’s Kingdom.