The Apostle Paul was bound by prison chains when he wrote to the church at Philippi. Despite his loss of liberty, and opposition from fellow-workers, the letter radiates joy - joy that Christ was proclaimed, joy in fellowship with the Philippian Christians, and above all joy in Jesus himself. Alec Motyer explores Paul's great themes, so relevant today: Christian unity; the Person of Jesus and what he has achieved for us; the call to live a life worthy of the gospel.