Mark 7:17-23 Meaning: Why the Disciples Needed Jesus to Explain Defilement
17When he had entered into a house away from the multitude, his disciples asked him about the parable.
18He said to them, “Are you also without understanding? Don’t you perceive that whatever goes into the man from outside can’t defile him,
19because it doesn’t go into his heart, but into his stomach, then into the latrine, making all foods clean?”
20He said, “That which proceeds out of the man, that defiles the man.
21For from within, out of the hearts of men, proceed evil thoughts, adulteries, sexual sins, murders, thefts,
22covetings, wickedness, deceit, lustful desires, an evil eye, blasphemy, pride, and foolishness.
23All these evil things come from within and defile the man.”
17And when he was entered into the house from the people, his disciples asked him concerning the parable.
18And he saith unto them, Are ye so without understanding also? Do ye not perceive, that whatsoever thing from without entereth into the man, it cannot defile him;
19Because it entereth not into his heart, but into the belly, and goeth out into the draught, purging all meats?
20And he said, That which cometh out of the man, that defileth the man.
21For from within, out of the heart of men, proceed evil thoughts, adulteries, fornications, murders,
22Thefts, covetousness, wickedness, deceit, lasciviousness, an evil eye, blasphemy, pride, foolishness:
23All these evil things come from within, and defile the man.
17And when he was entered into the house from the multitude, his disciples asked of him the parable.
18And he saith unto them, Are ye so without understanding also? Perceive ye not, that whatsoever from without goeth into the man, it cannot defile him;
19because it goeth not into his heart, but into his belly, and goeth out into the draught? This he said, making all meats clean.
20And he said, That which proceedeth out of the man, that defileth the man.
21For from within, out of the heart of men, evil thoughts proceed, fornications, thefts, murders, adulteries,
22covetings, wickednesses, deceit, lasciviousness, an evil eye, railing, pride, foolishness:
23all these evil things proceed from within, and defile the man.
17And when he entered into a house from the multitude, his disciples were questioning him about the simile,
18and he saith to them, `So also ye are without understanding! Do ye not perceive that nothing from without entering into the man is able to defile him?
19because it doth not enter into his heart, but into the belly, and into the drain it doth go out, purifying all the meats.'
20And he said--`That which is coming out from the man, that doth defile the man;
21for from within, out of the heart of men, the evil reasonings do come forth, adulteries, whoredoms, murders,
22thefts, covetous desires, wickedness, deceit, arrogance, an evil eye, evil speaking, pride, foolishness;
23all these evils do come forth from within, and they defile the man.'
17And when he went indoors from the crowd, his disciples asked him concerning the parable.
18And he says to them, Are ye also thus unintelligent? Do ye not perceive that all that is outside entering into the man cannot defile him,
19because it does not enter into his heart but into his belly, and goes out into the draught, purging all meats?
20And he said, That which goes forth out of the man, that defiles the man.
21For from within, out of the heart of men, go forth evil thoughts, adulteries, fornications, murders,
22thefts, covetousness, wickednesses, deceit, licentiousness, a wicked eye, injurious language, haughtiness, folly;
23all these wicked things go forth from within and defile the man.
Meaning in one sentence
In Mark 7:17-23, Jesus explains to his disciples that defilement comes from within, not from outside.
Context
This passage is the private explanation that follows a public confrontation. Moments earlier, Pharisees and scribes from Jerusalem had challenged Jesus because his disciples ate bread with unwashed hands. Jesus responded by calling the crowd together and declaring that nothing entering a person from outside can defile them, only what comes from within. Then he left the crowd and went into a house. The disciples, including Peter who spoke for the group, asked him about this “parable” (Mark 7:17; Matthew 15:15). They were puzzled because his words seemed to overturn generations of tradition about clean and unclean foods. In the house, away from the crowd, Jesus gives them the full meaning: the problem isn’t what goes into the stomach but what comes out of the heart. This moment marks a turning point, as Jesus prepares to move toward Tyre and Sidon, where he will encounter a Gentile woman whose faith astounds him.
Key Words
Three words open this passage to us. First, the disciples ask about parabole (“parable”). In Mark, a parable is often a saying that hides truth from those outside but reveals it to those inside (Mark 4:11). The disciples recognized that Jesus’ public statement about defilement carried deeper meaning, it wasn’t a simple rule change but a revelation about human nature.
Second, Jesus uses koinoo (“defile”) repeatedly. The word means “to make common” or “unclean” in a ritual sense. But Jesus flips the direction: uncleanness doesn’t enter from outside food; it flows outward from a defiled heart. The same word appears in Acts 10 when Peter learns not to call any person common or unclean.
Third, everything begins esothen, “from within,” out of the kardia (“heart”). In Jewish thought, the heart is the control center of a person: thoughts, intentions, desires. Jesus traces evil actions back to evil thoughts (dialogismoi kakoi), meaning deliberate reasonings that have gone wrong. The list that follows, thirteen specific evils, shows that our external sins are symptoms of an internal disease.
How Christians Read This Verse
Christians across traditions have read this passage as a crucial shift from external ritual to internal morality. Reformers like Matthew Henry emphasized that Jesus calls us away from trusting human traditions (like hand-washing) and toward the weightier matters of the heart. In the Reformed and Wesleyan traditions, commentators note that this teaching overturns the ceremonial law regarding foods, “making all foods clean” (Mark 7:19).
Meanwhile, Catholic and Orthodox traditions have understood the passage as emphasizing the need for inner purity without dismissing the importance of bodily disciplines. They point out that Jesus does not abolish the moral law, rather, he intensifies it by locating sin in the heart. The list of thirteen evils (including pride, deceit, and slander) remains a diagnostic tool for spiritual examination across every tradition. All agree: what we need is not just better behavior but a transformed heart.
A common misunderstanding
Some readers take this passage to mean that our external actions don’t matter at all, that only what we think or feel inside is important. In fact, Jesus lists concrete actions like murder, adultery, and theft as things that come from within and defile a person. The point is not that actions are irrelevant, but that they reveal the true condition of our hearts. Real purity isn’t achieved by washing hands or avoiding certain foods; it requires healing from the inside out.
Living This Out
This week, pay attention to what comes out of you when you’re not trying to impress anyone. Notice the angry word that slips out in traffic, the cynical thought about a coworker, the quiet envy when a friend succeeds. Jesus says these aren’t accidents, they show what is really inside. The list in verses 21-22 can become a personal inventory. Before you try harder to clean up your external behavior, bring the source of the problem to God. Ask him to change your heart, not just your habits. The good news is that the same Jesus who diagnoses the disease also offers the cure: a new heart, cleansed and made whole by grace.
Main takeaway: What truly defiles us comes from within our hearts, so we need inner transformation that only God can give.
For Families
For ages 5, 8
Jesus said the bad things we do start inside our hearts. Even if our hands are clean, our hearts might need washing. We can ask God to make our hearts clean.
For ages 9, 12
The disciples were confused when Jesus said food can’t make us unclean. But Jesus explained that the real problem is what comes out of our hearts, mean words, selfishness, lies. It’s like a dirty water fountain: the water can’t be clean if the source is dirty. So Jesus wants to change us from the inside. That’s why he died for our sins and sends the Holy Spirit to make our hearts new.
Questions People Ask
Why did the disciples call Jesus’ statement a “parable”?
They called it a parable because it was a dark or puzzling saying. In Mark, parables often conceal truth from outsiders while revealing it to those who are inside the circle of disciples. The disciples sensed that Jesus’ words about defilement carried more meaning than they first understood, so they asked for a private explanation.
What does “defile” mean in this passage?
The Greek word is koinoo, which means to make common or unclean. In a Jewish context, it referred to ritual impurity, being unfit for worship or fellowship. Jesus uses the word to show that real uncleanness isn’t from external things like food or unwashed hands, but from the sinful thoughts and actions that originate in the heart.
Does Mark 7:17-23 mean we can eat anything without concern?
Yes and no. The passage was understood by many Christian traditions as declaring all foods clean (Mark 7:19). However, the main point is not about diet but about the source of moral defilement. Some Christians still observe dietary restrictions as a spiritual discipline, but they do not believe that food itself makes them right or wrong before God. The heart is what matters.
What is the significance of the list of thirteen evils in verses 21-22?
Jesus lists thirteen specific evils to show that sin is not just a single action but a whole system of corruption within the heart. The list moves from actions (adultery, murder) to inner dispositions (greed, deceit, pride). It serves as a mirror for self-examination. No one is pure by their own efforts; everyone needs God’s grace to be changed from the inside.
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