Food doesn't come in contact with your heart, but only passes through the stomach and then comes out again? By saying this, he showed that every kind of food is acceptable. It is the thought life that defiles you, for from within, out of a person's heart, come evil thoughts, sexual immorality, theft, murder, adultery, greed, wickedness, deceit, eagerness for lustful pleasure, envy, slander, pride, and foolishness. All these vile things come from within. They are what defile you and make you unacceptable to God.