Hopefully making theology simpler to understand! (2 Corinthians 1:12)

Since we have these promises, beloved, let us cleanse ourselves from every defilement of body and spirit, bringing holiness to completion in the fear of God.
2 Corinthians 7:1, ESV

This is sanctification.

Let the Father change you through the Holy Spirit ever more to be like Christ. Repentance literally means “change your mind”. It takes a changing of the way you think to change your actions.