'Heart' in the Bible

They observed the Feast of Unleavened Bread for seven days with joy, for the Lord had caused them to rejoice and had turned the heart of the king of Assyria toward them, so that he encouraged them and strengthened their hands in the work of the house of God, the God of Israel.

For Ezra had set his heart (resolved) to study and interpret the Law of the Lord, and to practice it and teach His statutes and ordinances in Israel.

Blessed be the Lord, the God of our fathers [said Ezra], who put such a thing as this in the king’s heart, to adorn and glorify the house of the Lord in Jerusalem,