The Son of God

Season 2 Episode 2

Stained glass of the risen Christ exiting the tomb—Reformed Christology depiction of Jesus as the victorious Son of God and firstborn from the dead.

Special Guest: Kathryn Eshack

The Eternal Sonship of Christ

“Son of God” isn’t just a poetic title. It’s one of the clearest ways Scripture tells us who Jesus is—the eternal, divine Second Person of the Trinity. In this episode of The Restless Theologian, part of our Christology series, I talk with Kathryn Eshack about why calling Jesus the Son means far more than thinking of Him as a created being or some kind of subordinate. It’s about His eternal relationship with the Father, His full deity, and His place in God’s plan to save His people.

One Essence, Three Persons

The doctrine of the Trinity is where this starts. The Son isn’t created. He’s not less than the Father or the Spirit. He’s co-equal and co-eternal—distinct in person, but one in essence. The phrase “eternally begotten” isn’t about a moment in time, but about who He is in relationship to the Father. That’s what the church has always meant when it talks about His Sonship.

Scripture’s Witness to the Son

The Bible leaves no doubt about this. John 1 says the Word was with God and was God. Hebrews 1 calls Him the radiance of God’s glory and the exact imprint of His nature. Colossians 1 says all things were created through Him and for Him. He’s not just speaking for God—He is God. The same One who walked the earth is the Creator of the universe.

The Son’s Role in Redemption

The eternal Son took on human flesh. That’s the incarnation—the fulfillment of the messianic promises. As the Son, He reveals the Father, accomplishes salvation, and serves as our perfect prophet, priest, and king. His Sonship is tied to everything He came to do. It’s why His authority is absolute and why His mediation is effective. Without the eternal Son, there is no gospel. And as we explored in The Lamb of God, His identity as the Son is woven right into His role as the sacrifice for sin.

Guarding the Truth: Heresies and Creeds

This hasn’t always been uncontested. In the early church, Arianism denied that the Son was fully God. The Nicene Creed answered with clarity—affirming His eternal generation and full deity. These definitions weren’t just theological exercises. They were defenses of the gospel itself. Get the identity of the Son wrong, and you get the whole message of salvation wrong.

Why It Matters Now

Knowing Jesus as the Son of God shapes how we worship, how we pray, and how we understand our adoption as children of God. Union with the Son means we share in His relationship with the Father. It’s personal and it’s powerful. And like we saw in The Light of the World, His identity is more than comfort—it’s the anchor for our faith in every season.