God wants the world to see us and see Jesus Christ in us. The life of a child of God should be enough reason why an unbeliever should want to give his life to Christ.
A very influential Muslim once said that if he can find 10 pastors like Pastor Enoch Adejare Adeboye he will give his life to Christ. The moment you call yourself a christian, you become an example of who Christ is to the world, so you must mirror the exact image of Christ. The way the world sees a child of God is the same way they will see God.
This is a major reason why humility must be our lifestyle. The lifestyle of a child of God is more effective than years of evangelism. Believe me honestly, nobody will yield to the message of salvation coming from the same mouth that just insulted them.
When you make Godly humility a part of your character, you are a winner in Christ, even if you don't win in all situations.