'Hearts' in the Bible

This will I do to you: I will put fear in your hearts, even wasting disease and burning pain, drying up the eyes and making the soul feeble, and you will get no profit from your seed, for your haters will take it for food.

And upon them that are left alive of you I will send a faintness into their hearts in the lands of their enemies; and the sound of a shaken leaf shall chase them; and they shall flee, as fleeing from a sword; and they shall fall when none pursueth.

And they will have grief for their sins and for the sins of their fathers, when their hearts were untrue to me, and they went against me;

And that I also have walked contrary unto them, and have brought them into the land of their enemies; if then their uncircumcised hearts be humbled, and they then accept of the punishment of their iniquity: