'Heart' in the Bible

But when his heart was exalted and his spirit became arrogant, he was deposed from his royal throne and his glory was taken from him.

“But you his successor, Belshazzar, have not humbled your heart, even though you knew all this.

The king of the North will return to his land with great wealth, but his heart will be set against the holy covenant; he will take action, then return to his own land.