'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 as for the rest of you, I will make their hearts feeble in the land of their haters, and the sound of a leaf moved by the wind will send them in flight, and they will go in flight as from the sword, falling down when no one comes after them;

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;

So that I went against them and sent them away into the land of their haters: if then the pride of their hearts is broken and they take the punishment of their sins,