[Jeremiah 31:31-34]
31 “Behold, the days are coming, says the Lord, when I will make a new covenant with the house of Israel and with the house of Judah—
32 not according to the covenant that I made with their fathers in the day that I took them by the hand to lead them out of the land of Egypt, My covenant which they broke, though I was a husband to them, says the Lord.
33 But this is the covenant that I will make with the house of Israel after those days, says the Lord: I will put My law in their minds, and write it on their hearts; and I will be their God, and they shall be My people.
34 No more shall every man teach his neighbor, and every man his brother, saying, ‘Know the Lord,’ for they all shall know Me, from the least of them to the greatest of them, says the Lord. For I will forgive their iniquity, and their sin I will remember no more.”

[2 Cor. 3:1-18]
1 Do we begin again to commend ourselves? Or do we need, as some others, epistles of commendation to you or letters of commendation from you?
2 You are our epistle written in our hearts, known and read by all men;
3 clearly you are an epistle of Christ, ministered by us, written not with ink but by the Spirit of the living God, not on tablets of stone but on tablets of flesh, that is, of the heart.
4 And we have such trust through Christ toward God.
5 Not that we are sufficient of ourselves to think of anything as being from ourselves, but our sufficiency is from God,
6 who also made us sufficient as ministers of the new covenant, not of the letter but of the Spirit; for the letter kills, but the Spirit gives life.
7 But if the ministry of death, written and engraved on stones, was glorious, so that the children of Israel could not look steadily at the face of Moses because of the glory of his countenance, which glory was passing away,
8 how will the ministry of the Spirit not be more glorious?
9 For if the ministry of condemnation had glory, the ministry of righteousness exceeds much more in glory.
10 For even what was made glorious had no glory in this respect, because of the glory that excels.
11 For if what is passing away was glorious, what remains is much more glorious.
12 Therefore, since we have such hope, we use great boldness of speech—
13 unlike Moses, who put a veil over his face so that the children of Israel could not look steadily at the end of what was passing away.
14 But their minds were blinded. For until this day the same veil remains unlifted in the reading of the Old Testament, because the veil is taken away in Christ.
15 But even to this day, when Moses is read, a veil lies on their heart.
16 Nevertheless when one turns to the Lord, the veil is taken away.
17 Now the Lord is the Spirit; and where the Spirit of the Lord is, there is liberty.
18 But we all, with unveiled face, beholding as in a mirror the glory of the Lord, are being transformed into the same image from glory to glory, just as by the Spirit of the Lord.