a.ServantsPaul identifies himself as a servant not an apostle which is really unusual but then he writes later on about being a servant like Christ.
b.Holy peoplePaul calls the Philippians “holy people” and proceeds to write about it in the letter. There is no question that this is God’s standard for living and always has been. From the Old Testament right on through the New Testament the message never changes. We are called to follow God and be holy.
c.UnityLastly throughout the whole book he is urging them to unity and working together. All of this is woven together with a spirit of joyfulness. This is considered to be the most joyful of Paul’s writings. The message is about Christ and no other noun appears more than His name.