Pharisees and scribes come from Jerusalem with a complaint about the disciples: 2"they do not wash their hands when they eat." The issue is a religious custom handed down by the elders, and many treated it as though it carried the weight of Moses. Jesus skips the defense of his disciples' manners and asks a bigger question: 3"why do you break the commandment of God for the sake of your tradition?"
Then he gives an example. God commanded children to honor their father and mother, and that included providing for them. But a man could declare that what he owed his parents was 5"given to God" (Mark 7:11 uses the word Corban), and by that one move he was free of the duty while keeping the money. A tradition meant to guard devotion to God had become a loophole around one of the Ten Commandments. Nobody in the crowd could defend it once it was said out loud. Jesus states it flatly: 6"for the sake of your tradition you have made void the word of God." Void means canceled. The elders would have said they were protecting the law, and their fence had swallowed the thing it surrounded.
He turns to Isaiah, and the fit is exact. 8"This people honors me with their lips, but their heart is far from me." Correct words, careful rituals, and a heart somewhere else. Every generation hands something down, and much of it is good. The trouble begins when a tradition takes a seat above God's word and starts giving orders that cancel it. It usually happens slowly, through people who mean well, and each generation inherits the fence and forgets what it was built to protect.
Then Jesus widens the point to everyone. He calls the crowd over: 11"it is not what goes into the mouth that defiles a person, but what comes out of the mouth." Even Peter needs it explained. Food passes through the body and leaves, and it never touches the center of a person. Words and deeds travel another road. 18"What comes out of the mouth proceeds from the heart," and Jesus lists what the heart can produce: 19"evil thoughts, murder, adultery, sexual immorality, theft, false witness, slander." No amount of washing reaches a single item on that list.
That should unsettle anyone who assumes careful religion means a healthy heart. The Pharisees were scrupulous, consistent people, and Jesus still calls them hypocrites. Precision is not purity. A heart can keep every outward habit and still be where Isaiah found it, far away.
The remedy relocates the problem. What is wrong with us was never going to be fixed by washing our hands more carefully. It sits at the source, in the heart, where no tradition, however old or well meant, has the power to reach. David knew where the need was: "Create in me a clean heart, O God" (Psalm 51:10). Only the one standing in front of the Pharisees that day could answer that prayer.
Prayer
Father, we have our own careful habits, our own version of handwashing, and we keep them faithfully while our hearts wander. Show us where our devotion has hardened into a rule that lets us avoid what you ask. We cannot wash our own hearts clean. Create in us a clean heart, and do what no tradition ever could. In Jesus' name, amen.