'Hearts' in the Bible

John came, and gave baptism in the waste land, preaching baptism as a sign of forgiveness of sin for those whose hearts were changed.

And saying, The time has come, and the kingdom of God is near: let your hearts be turned from sin and have faith in the good news.

But there were certain of the scribes seated there, and reasoning in their hearts,

And Jesus, having knowledge in his spirit of their thoughts, said to them, Why are you reasoning about these things in your hearts?

And looking round on them he was angry, being sad because of their hard hearts; and he said to the man, Put out your hand. And he put it out, and his hand was made well.

And these are they who were planted on the good earth; such as give ear to the word, and take it into their hearts, and give fruit, thirty and sixty and a hundred times as much.

For it was not clear to them about the bread; but their hearts were hard.

And Jesus, hearing it, said to them, Why are you reasoning among yourselves because you have no bread? do you still not see, and is it still not clear to you? are your hearts so hard?

But Jesus said to them, Because of your hard hearts he gave you this law.

And whenever you make a prayer, let there be forgiveness in your hearts, if you have anything against anyone; so that you may have forgiveness for your sins from your Father who is in heaven.

Are we to give or not to give? But he, conscious of their false hearts, said to them, Why do you put me to the test? give me a penny, so that I may see it.

And later he was seen by the eleven themselves while they were taking food; and he said sharp words to them because they had no faith and their hearts were hard, and because they had no belief in those who had seen him after he had come back from the dead.