One God: Father, Son, and Holy Spirit
Christians are "stewards of the mysteries of God" (1 Corinthians 4:1). One of those mysteries is the self-revealed identity of God as Trinity. Christians themselves have had to struggle to understand what the Trinity means. The history of church theology is rife with heated conversations plumbing the depths of human insight on this subject. From Irenaeus in the second century to Augustine in the fifth century, the church forged basic formulas and commentaries that have since then shaped Christian thought on the matter.