'Heart' in the Bible

And when he had looked round about on them with anger, being grieved at the hardening of their heart, he saith unto the man, Stretch forth thy hand. And he stretched it forth; and his hand was restored.

for they understood not concerning the loaves, but their heart was hardened.

And he said unto them, Well did Isaiah prophesy of you hypocrites, as it is written, This people honoreth me with their lips, But their heart is far from me.

because it goeth not into his heart, but into his belly, and goeth out into the draught? This he said , making all meats clean.

For from within, out of the heart of men, evil thoughts proceed, fornications, thefts, murders, adulteries,

And Jesus perceiving it saith unto them, Why reason ye, because ye have no bread? do ye not yet perceive, neither understand? have ye your heart hardened?

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

Verily I say unto you, Whosoever shall say unto this mountain, Be thou taken up and cast into the sea; and shall not doubt in his heart, but shall believe that what he saith cometh to pass; he shall have it.

and thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind, and with all thy strength.

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

And afterward he was manifested unto the eleven themselves as they sat at meat; and he upbraided them with their unbelief and hardness of heart, because they believed not them that had seen him after he was risen.