Hear and understand: not what goes into the mouth defiles a man, but what comes out of the mouth, this defiles a man.... Do you not see that whatever goes into the mouth passes into the stomach, and so passes on? But what comes out of the mouth proceeds from the heart, and this defiles a man. For out of the heart come evil thoughts, murder, adultery, fornication, theft, false witness, slander. These are what defile a man.

(Jesus Christ)