'Heart' in the Bible

And it shall come to pass at that time, that I will search Jerusalem with lamps; and I will punish the men that are settled on their lees, that say in their heart, Jehovah will not do good, neither will he do evil.

This is the joyous city that dwelt carelessly, that said in her heart, I am, and there is none besides me: how is she become a desolation, a place for beasts to lie down in! every one that passeth by her shall hiss, and wag his hand.

Sing, O daughter of Zion; shout, O Israel; be glad and rejoice with all the heart, O daughter of Jerusalem.