To change your heart so you want to obey and follow God fully, like removing a cover from your heart.
All Scripture References (3)
Deuteronomy (2)
Deuteronomy 10:16
Circumcise your hearts, therefore, and stiffen your necks no more.
Deuteronomy 30:6
The LORD your God will circumcise your hearts and the hearts of your descendants, and you will love Him with all your heart and with all your soul, so that you may live.
Jeremiah (1)
Jeremiah 4:4
Circumcise yourselves to the LORD, and remove the foreskins of your hearts, O men of Judah and people of Jerusalem. Otherwise, My wrath will break out like fire and burn with no one to extinguish it, because of your evil deeds.”