In Matthew 15:10-20, Jesus explained what He said to the pharisees. The disciples said that the pharisees were offended by what Jesus said. Jesus talked about what comes out of your heart. He said that is what defiles a man. Why? Your heart is who you are. This is the part of you that is eternal. It came from God when you were born and it is the part you that goes back to God. Jesus said it a different way, out of the abundance of the heart the mouth speaks. He explained the principle to the disciples. Jesus said, the pharisees are the blind leading the blind. He said to leave them alone. Jesus talked about the wisdom of God and then said, with wisdom get understanding. We are made up of 3 parts, body, soul and spirit. The body is the dust of the earth, our soul is the life of God and our spirit is who we are. So, we are to guard our mouth and have God to change our heart into His image. Because that which proceeds out of our mouth defiles the man.