'Heart' in the Bible

So he said to them, "Isaiah prophesied correctly about you hypocrites, as it is written, 'This people honors me with their lips, but their heart is far, far away from me.

For it does not enter into his heart but into his stomach, and goes out into the latrine"--[thus] declaring all foods clean.

For from within, from the heart of people, come evil plans, sexual immoralities, thefts, murders,

But Jesus said to them, "He wrote this commandment for you because of your hardness of heart.

Truly I say to you that whoever says to this mountain, 'Be lifted up and thrown into the sea!' and does not doubt in his heart, but believes that what he says will happen, it will be [done] for him.

And you shall love the Lord your God from your whole heart and from your whole soul and from your whole mind and from your whole strength.'

And to love him from your whole heart and from your whole understanding and from your whole strength, and to love your neighbor as yourself, is much more than all whole burnt offerings and sacrifices."

And later, [while] they were reclining at table, he appeared to the eleven. And he reprimanded their unbelief and hardness of heart, because they did not believe those who had seen him [after he] had been raised.