'Heart' in the Bible

He answered them, "Well did Isaiah prophesy of you hypocrites, as it is written, 'This people honors me with their lips, but their heart is far from me.

because it doesn't go into his heart, but into his stomach, then into the latrine, thus purifying all foods?"

Jesus, perceiving it, said to them, "Why do you reason that it's because you have no bread? Don't you perceive yet, neither understand? Is your heart still hardened?

But Jesus said to them, "For your hardness of heart, he wrote you this commandment.

For most certainly I tell you, whoever may tell this mountain, 'Be taken up and cast into the sea,' and doesn't doubt in his heart, but believes that what he says is happening; he shall have whatever he says.

you shall love the Lord your God with all your heart, and with all your soul, and with all your mind, and with all your strength.' This is the first commandment.

and to love him with all the heart, and with all the understanding, with all the soul, and with all the strength, and to love his neighbor as himself, is more important than all whole burnt offerings and sacrifices."

Afterward he was revealed to the eleven themselves as they sat at the table, and he rebuked them for their unbelief and hardness of heart, because they didn't believe those who had seen him after he had risen.