Matthew 12:34-36
You brood of vipers! how can you speak good, when you are evil? For out of the abundance of the heart the mouth speaks.
Matthew 15:19
For out of the heart come evil thoughts, murder, adultery, fornications, theft, false witness, slander.
Matthew 23:13
"But woe to you, scribes and Pharisees, hypocrites! For you shut up the kingdom of heaven against men; for you neither enter yourselves, nor do you allow those who would enter to go in.
Acts 5:3-4
But Peter said, "Ananias, why has Satan filled your heart to lie to the Holy Spirit and to keep back some of the price of the land?
Acts 8:21-22
You have no part or share in this matter, for your heart is not right before God.
James 1:14-15
But each one is tempted when he is carried away and enticed by his own desire.
James 1:27
Religion that is pure and undefiled in the sight of our God and Father is this: to visit orphans and widows in their distress, and to keep oneself unstained by the world.
James 3:5-6
So also the tongue is a small part of the body, and yet it boasts of great things. See how great a forest is set aflame by such a small fire!