'Heart' in the Bible

And they went out, preaching the need for a change of heart in men.

For they all saw him, and were troubled. But straight away he said to them, Take heart, it is I, have no fear.

And he said, Well did Isaiah say of you, you false ones: These people give me honour with their lips, but their heart is far from me.

Because it goes not into the heart but into the stomach, and goes out with the waste? He said this, making all food clean.

Because from inside, from the heart of men, come evil thoughts and unclean pleasures,

Truly I say to you, Whoever says to this mountain, Be taken up and be put into the sea; and has no doubt in his heart, but has faith that what he says will come about, he will have his desire.

And you are to have love for the Lord your God with all your heart, and with all your soul, and with all your mind, and with all your strength.

And to have love for him with all the heart, and with all the mind, and with all the strength, and to have the same love for his neighbour as for himself, is much more than all forms of offerings.