'Heart' in the Bible

On the seventh day, when the heart of the king was merry with wine, he commanded Mehuman, Biztha, Harbona, Bigtha, and Abagtha, Zethar, and Carcass, the seven eunuchs who served in the presence of Ahasuerus the king,

Then Haman went out that day joyful and glad of heart, but when Haman saw Mordecai in the king's gate, that he didn't stand up nor move for him, he was filled with wrath against Mordecai.

So Haman came in. The king said to him, "What shall be done to the man whom the king delights to honor?" Now Haman said in his heart, "Who would the king delight to honor more than myself?"

Then King Ahasuerus said to Esther the queen, "Who is he, and where is he who dared presume in his heart to do so?"