When we get saved the Holy Spirit comes and indwells in our lives. What a blessing to know that we carry the Holy Spirit of God with us everywhere we go! However, from that moment on something else wonderful takes place--the sanctifying work of the Holy Spirit in your life. Galatians 3:3 "Are ye so foolish? having begun in the Spirit, are ye now made perfect by the flesh?"
Once we belong to God , He has a strong desire to sanctify you. Sanctify means "to set apart".
The Holy Spirit does not stop after you get saved, now He is working to set you apart from the world.
Philippians 1:6 "Being confident of this very thing, that he which hath begin a good work in you will perform it until the day of Jesus Christ".