In one of the most important verses in all of the Bible, Paul tells us to elevate the needs of others above our own, in order that we might walk in the power of the Gospel. Now God in His brilliant design, creates within humanity a tremendous diversity. Why does he do that? In order to advance the Gospel. When the world looks upon a group of very different people, and sees them loving and accepting and esteeming one another above themselves, they must judge that Christianity is true.