And he said, That which cometh out of the man, that defileth the man. Mark 7:20
Isn't it amazing that the things we think defiles a man is not what Jesus says defiles a man. Man has always and probably always will has his viewpoint on what or how something should be. That's why it is so important that we seek the Word of God for proper guidance and the correct standard of living.
In Mark 7:15, Jesus tells the Pharisees, "There is nothing from without a man, that entering into him can defile him: but the things which come out of him, those are they that defile the man." Those are the things that make him unclean.
Earlier in the scripture, the Pharisees questioned Jesus as to why His disciples walked not according to the tradition of the elders? See it was custom for the Pharisees and all the Jews to not eat unless they gave their hands a ceremonial washing. But because the disciple began to eat without washing their hands, they wanted to know why they didn't hold to tradition. Jesus response to them is a response that we need to remember as well. He tells them that just as it was prophesied by Isaiah of the hypocrites that they honor Him with their lips, but their hearts is far from Him. They are so concern with holding on to traditions of men that they let go of the commands of God. They just as some of us, are so concern with traditions, that we lose sight of what's important; that which God has told us to do.
In Mark 7:18-19, Jesus has to explain to the disciples as well that "whatsoever thing from without entereth into the man, it cannot defile him; Because it entereth not into his heart, but into the belly, and goeth out into the draught, purging all meats." He goes on to tell them that, "that which cometh out of the man, that defileth the man. For from within, out of the heart of men, proceed evil thoughts, adulteries, fornications, murders, thefts, covetousness, wickedness, deceit, lasciviousness, an evil eye, blasphemy, pride, foolishness. All these evil things come from within, and defile the man" (See Mark 7:21-23).
This is important for us to remember when we become so quick to criticize or judge someone else. Don't get so caught up in appearing to be good or holy for tradition sake. But to be holy through our living; through our words an our deeds: because Jesus is holy and we are trying to live a life that is pleasing to Him.