'Hard' in the Bible

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.

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?

Then again he put his hands on his eyes; and looking hard, he was able to see, and saw all things clearly.

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

And Jesus, looking round about, said to his disciples, How hard it is for those who have wealth to come into the kingdom of God!

And the disciples were full of wonder at his words. But Jesus said to them again, Children, how hard it is for those who put faith in wealth to come into the kingdom of God!

And it will be hard for women who are with child and for her who has a baby at the breast in those days.

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.