A ten-lesson course on the identity of God
The Godhead
One true God the Father, His only begotten Son, and the Spirit who is their own presence — the faith once delivered, recovered in ten lessons
No question sits closer to the heart of worship than this one: who is God? This ten-lesson course walks the whole biblical doctrine of the Godhead from the ground up — the one true God who is the Father and Source of all, His literally begotten and fully divine Son, and the Holy Spirit who is the very life and presence of the Father and the Son rather than a third separate being. It lets Scripture define God from Genesis to Revelation, weighs the rival creeds of Christendom honestly, shows what the doctrine costs the gospel when the real Father–Son relationship is lost, and closes with the documented history of how the Trinity was formulated — and the begotten-Son faith the faithful kept through it all. Scripture first and Scripture only throughout, letting the Bible define God in its own words.
Why It Matters — God Is Not a "Mystery"
Knowing the true God is not optional theology — Jesus called it eternal life itself (John 17:3). This opening lesson shows why the identity of God is the ground everything else rests on, and answers the objection that God is an unknowable "mystery": Christ came precisely to declare the Father.
The Three Gods of Christendom
Before we can find the true God we must see clearly the three rival pictures of Him in Christendom — the Trinity, tri-theism, and Oneness/modalism — and the one thing they all quietly share: the denial of a real Father and a real Son.
The One True God Is the Father
The master key of the whole study: Scripture's one God is the one Source of all things — the Father (1 Corinthians 8:6; John 17:3). This lesson shows how that single truth lets us honor the full divinity of the Son while holding, with all of Scripture, that there is one God.
Two Divine Beings in the Old Testament
From Genesis onward the Old Testament reveals one God and a second divine Being at His side — the Angel, the Word, the Wisdom, the Son who came forth from Him — together with the Spirit that is God's own breath and presence. Never a third divine person called 'God the Spirit.'
The Witness of Christ Himself
What did Jesus say about God? In the Gospels He calls the Father 'the only true God,' worships Him, and claims the divine Name as the Word who speaks the Father's words — yet never once claims to be the one true God Himself. We let Christ define the Godhead.
The Only Begotten Son
Begotten, not created — the divine Son, the Wisdom of God, Michael the Archangel
Son of God, not "God the Son." This lesson makes the central case: Christ is the literally begotten — brought forth — divine Son, begotten not created, equal with the Father by inheritance and Sonship; the same One Scripture names the Wisdom of God and Michael the Archangel.
Another Jesus, Another Gospel
Doctrine has consequences. A merely metaphorical Son cannot be really tempted and cannot really die — so the Trinity, however unintentionally, hollows out both Christ’s victory and the atonement. A real Son means a real battle and a real sacrifice.
Who Is the Holy Spirit?
If a person's spirit is that person's own life and presence, then the Holy Spirit is the very life and presence of the Father and the Son — fully personal, because it is Christ's own person come to dwell in us — not a third, separate being.
Pentecost and the Indwelling Christ
Pentecost is the key that unlocks the Spirit: the Comforter is the glorified, Divine-Human life of Christ, poured out to live in His people. This lesson follows that life from Pentecost to the indwelling Christ — and shows why it is the very heart of righteousness by faith.
How the Trinity Was Made
Nicaea, Constantinople, and the begotten-Son faith the faithful kept
The Trinity is not in the Bible by name or by statement; it was formulated across the fourth century and enforced by the power of the state. This closing lesson walks that history honestly, reclaims the slandered "Arian" label, traces the begotten-Son faith kept by the faithful — then calls the reader home to the God of Scripture.