In many ways, Philippians 2:1-13 is the most amazing passage in the Bible. That the one through whom all things were created would come down to us in the form of a servant—it's just astounding! Paul calls us to follow Christ in this regard, caring for each other, recognizing that we do so because of what has already been done for us.
Note: this passage also contains one of the earliest Christian hymns.
Song of Emptiness