2 Corinthians 3:3

3:3 revealing that you are a letter of Christ, delivered by us, written not with ink but by the Spirit of the living God, not on stone tablets but on tablets of human hearts.

2 Corinthians 3:8-10

3:8 how much more glorious will the ministry of the Spirit be? 3:9 For if there was glory in the ministry that produced condemnation, how much more does the ministry that produces righteousness excel in glory! 3:10 For indeed, what had been glorious now has no glory because of the tremendously greater glory of what replaced it.

2 Corinthians 3:18

3:18 And we all, with unveiled faces reflecting the glory of the Lord, are being transformed into the same image from one degree of glory to another, which is from the Lord, who is the Spirit.