“Some Christians are stalled out in their sanctification for simple lack of effort. They need to know about the Spirit’s power. They need to be rooted in gospel grace. They need to believe in the promises of God. And they need to fight, strive, and make every effort to work out all that God is working in them. Let us say with Paul, ‘I worked harder than any of them, though it was not I, but the grace of God that is with me’ (1 Corinthians 15:10). Without this biblical emphasis, we’ll be confused, wondering why sanctification isn’t automatically flowing from a heartfelt commitment to gospel-drenched justification. We’ll be waiting around for enough faith to really ‘get the gospel’ when God wants us to get up and get to work (Philippians 2:12–13). Because when it comes to growth in godliness, trusting does not put an end to trying.” (90–91)
-Kevin DeYoung, The Hole in Our Holiness: Filling the Gap Between Gospel Passion and the Pursuit of Godliness