The books of Galatians, Ephesians, Philippians, and Colossians form a cluster of Epistles that make up the heart of the divine revelation in the New Testament. The essential subject of these four books is Christ and the church. Galatians reveals that Christ is versus religion with its law; Ephesians reveals the church as the Body of Christ; Philippians concerns the experience, the living out, of Christ; and Colossians unveils the all-inclusive and all-extensive Christ as the Head of the Body.