Paul's letters to the Galatians, Ephesians, and Philippians have struck an indelible impression on Christian tradition and piety. The doctrines of Christ, of salvation, and of the church all owe their profiles to these letters. And for patristic interpreters, who read Scripture as a single book and were charged with an insatiable curiosity regarding the mysteries of the Godhead, these letters offered profound visions seldom captured by modern eyes. Trinitarian truth was patterned in the apostle's praise of God who is "over all, through all and in all" (Ephesians 4:6). Without a doubt the...