Part 8 · Deep dive
The central insight
Union with Christ: the heart of salvation and its eternal goal.
Every part of salvation, from justification to glory, comes to us in one way: by being joined to Jesus Christ. Salvation is not a thing God gives apart from Christ; it is Christ Himself.
In Christ
Jesus: 'Remain in me, and I will remain in you.' The epistles use 'in Christ' over and over: chosen, redeemed, forgiven, made new, raised and seated, all 'in Him'.
Sharing God's life
Peter says believers 'share His divine nature' (2 Peter 1:4). The early church called this theosis: not becoming God by nature, but sharing by grace in the life of the Father, Son and Spirit.
The early church
Irenaeus of Lyons · c. 180 · Against Heresies 5 preface
Christ 'became what we are, that He might bring us to be even what He is himself'.
Basil the Great · c. 375 · On the Holy Spirit 9.23
Through the Spirit come abiding in God, likeness to God and, highest of all, being made godlike.
Eternal life
'This is the way to have eternal life: to know you, the only true God, and Jesus Christ, the one you sent' (John 17:3). Eternal life is not only endless time but a quality of life, knowing God, which begins now and is completed when we see Him face to face.
Why this matters forever
Outside Christ there is no salvation, and Scripture warns of a final separation from God's presence (2 Thessalonians 1:9). 'How can we escape if we ignore this great salvation?' (Hebrews 2:3). But in Christ there is 'no condemnation' (Romans 8:1), and 'everyone who calls on the name of the LORD will be saved' (Romans 10:13).
Where to go next
Where to go from here
Theme
What Is the Gospel? →
The good news of what God has done in Jesus to rescue us from sin and death.
Theme
Understanding Sin →
The problem the gospel answers: what sin is and why its stakes are eternal.
Theme
Justification and Salvation →
How God removes condemnation and declares sinners right with Him.
Theme
Grace, Faith, and Works →
Salvation as God's gift, received by faith and lived out in love.
Theme
The Holy Spirit and Sanctification →
How the Spirit frees us from sin and makes us holy.
Theme
Resurrection and the Life to Come →
Christ's victory over death and the hope of new creation.
Key takeaways
- All of salvation comes through union with Christ.
- The goal is to share God's life and know Him forever.
- The offer is urgent and open to everyone who calls on Him.