By Brian Wachter
Have you ever wondered why Paul spends so much time reminding believers of the gospel in his letters? He is not writing to the lost, but to those who already belong to Christ. Why rehearse what they already know?
Because in Paul’s mind, the gospel is not just the entry point of the Christian life—it is the driving force of it.
We often treat the gospel as the doorway into salvation. We celebrate that in Christ we are new creations (2 Corinthians 5:17), forgiven and brought into God’s family. But then what? It’s easy to assume that growth now comes through effort, discipline, or greater knowledge. Paul does not share that assumption. Again and again, he brings believers back to the gospel—not because they have forgotten it intellectually, but because they are not yet fully living from it.
The gospel fuels transformation. In Romans 12:1, Paul writes, “I appeal to you therefore, brothers and sisters, by the mercies of God…” That “therefore” carries the weight of everything he has said about God’s saving work in Romans 1-11. Transformation—offering our lives to God, being renewed, living differently—comes by the mercies of God, not apart from them. The gospel does not merely forgive sin; it re-forms the person.
This is what Paul captures in 2 Corinthians 3:16–18. When we turn to the Lord, the veil is removed. We are no longer blinded or distant but brought near. And as we behold the glory of the Lord with unveiled face, we “are being transformed into the same image from one degree of glory to another.” Transformation is not self-generated; it comes as we continually look to Christ. Where the Spirit of the Lord is, there is freedom—the freedom not just from sin’s penalty, but from its power, and into a new way of living.
Titus makes this explicit: the grace that saves us is the same grace that trains us to live differently (Titus 2:11–14). The gospel is not just the announcement of forgiveness, but the ongoing work of renewal by the Holy Spirit (Titus 3:4–8). In other words, grace doesn’t just pardon us—it actively forms us into a people who reflect Christ. Good works are not the basis of transformation—they are the fruit of a life being renewed by the gospel. Dallas Willard captures this dynamic well, “The most important thing in your life is not what you do; it’s who you become.” And the gospel is God’s means of shaping who we are becoming—day by day, “from one degree of glory to another.”
As Jerry Bridges puts it,
“Jesus did not die just to save us from the penalty of sin, nor even just to make us holy in our standing before God. He died to purify for Himself a people eager to obey Him, a people eager to be transformed into His likeness.”
This is the ongoing work of the gospel in the life of a believer. It humbles us, secures us, frees us, and compels us. The love of Christ reshapes not just what we do, but also what we desire.
I have often seen how easy it is to substitute knowledge about God for truly knowing Him. I could explain the gospel, defend it, and teach it, and yet could still fail to experience its transforming power. For years, I assumed the gospel was mainly for non-Christians—the message that brings you in, after which you move on to other things. Growth, I thought, came from trying harder or knowing more. But over time, the Lord exposed how shallow that thinking was. The gospel is not just the gate I pass through once; it is the path I am meant to walk every day. Not just something I believe, but something I live from. And I have come to see that the lack of transformation in areas of my life was not due to a lack of knowledge, but a failure to continually return to, rehearse, and rely upon the gospel of God’s grace.
Perhaps that is why Paul keeps reminding followers of Christ of the gospel. Not because we need something new, but because we need to live more deeply from what is already true. The gospel is not just where the Christian life begins—it is how it continues, and how we are, day by day, transformed into the likeness of Christ.
Practical Next Steps:
- Take time to learn a helpful practice on bringing the gospel to mind by ‘Preaching the Gospel to Yourself,’ which was popularised by longtime Navigators staff, Jerry Bridges. He very practically explains the process of how he preached the gospel to himself in this short article… CLICK HERE: https://www.challies.com/reading-classics-together/preach-the-gospel-to-yourself/
- Preach the gospel to yourself daily—remind yourself of what is already true in Christ and where your identity is rooted. Learn and rehearse 10 gospel passages like Colossians 1:13-14 or 1 Peter 2:24-25.
- Identify one area of your life where you are striving in your own effort and intentionally return to the grace of God in that area this week.
- Build a simple rhythm of “beholding”—spend time each day reflecting on the person and work of Jesus through Scripture, asking God to transform you as you do.
- Share with someone you trust where you are needing gospel transformation and invite them to walk with you in it.
The Transforming Power of the Gospel…for Followers of Christ
Bible Study
Read and reflect on Romans 12:1-2; 2 Corinthians 3:16–18; Titus 2:11–14; and Titus 3:4–8.
- Reflect: According to these passages, what role does grace play in your transformation? Is it something that only saves you, or something that actively trains and renews you?
- Consider: What does it practically look like in your life to “behold the glory of the Lord”? Where might you be trying to change apart from this?
- Examine: Titus 2 says grace trains us to renounce ungodliness. What is one area where God’s grace is currently inviting you to say “no” to something—and “yes” to a new way of living?
- Discuss: In what ways have you been relying on effort, knowledge, or discipline apart from the gospel? How might returning to the gospel reshape that area?
- Respond: Titus 3 speaks of renewal by the Holy Spirit. What is one specific step you can take this week to cooperate with that work of renewal?
As you return to the gospel, not just as something you believe, but something you live from, you place yourself where real transformation happens—before the Lord, with unveiled face, being changed by His Spirit from one degree of glory to another.