The document provides background on the founding of the church at Philippi and Paul's relationship with that church. It then summarizes the themes of each chapter: Chapter 1 discusses Christ as our life, Chapter 2 discusses Christ as our example in humility, Chapter 3 discusses having confidence in Christ rather than in ourselves, and Chapter 4 discusses finding strength through Christ. The overarching theme is finding joy in our Christian walk through focusing on Christ in all aspects of our lives and relationships.