'Heart' in the Bible

Their wicked deeds do not allow them to return to their God; because a spirit of idolatry controls their heart, and they do not acknowledge the Lord.

Their heart is slipping; soon they will be punished for their guilt. The Lord will break their altars; he will completely destroy their fertility pillars.

How can I give you up, O Ephraim? How can I surrender you, O Israel? How can I treat you like Admah? How can I make you like Zeboiim? I have had a change of heart! All my tender compassions are aroused!