A35: Sanctification is the work of God’s free grace₁, whereby we are renewed in the whole man after the image of God₂, and are enabled more and more to die unto sin, and live unto righteousness₃.

1. 2 Thessalonians 2:13
2. Ephesians 4:23-24
3. Romans 6:4,6; Romans 8:1

For further study see:

1. Dr. Dennis Prutow explains WSC 35 concerning Sanctification