If you were in jail, what sort of letter would you write to your Christian friends? Would it focus on the difficulties—the poor food, cramped quarters and lonely isolation? Paul's letter to the Philippians, written from prison, has no hint of self-pity. The letter radiates joy—joy that Christ was proclaimed, joy in fellowship with the Philippian Christians and, above all, joy in Jesus himself. In this volume of the Bible Speaks Today series, Alec Motyer identifies three major themes that filled Paul's heart and mind as he wrote: the unity of the church, the person of Jesus and what he has achieved, and the call to live a life worthy of the gospel.