Question 1

What does Matthew 15:18 mean?

Accepted Answer

Matthew 15:18 teaches that the words a person speaks come from what is truly in their heart, and these words are what can make a person spiritually unclean. According to this verse, it is not external things that defile someone, but the inner thoughts and attitudes revealed through speech. In this passage, Jesus is speaking to a crowd, responding to criticism from religious leaders about ritual handwashing. Jesus shifts the focus from outward religious practices to the inner moral state, explaining that what comes out of a person’s mouth—reflecting their heart—shows their true character and can lead to spiritual impurity.

Question 2

The Greek behind Matthew 15:18

Accepted Answer

καρδία (kardia, "heart"): In Greek, this word refers not just to emotions but to the inner self, including thoughts, intentions, and desires. Jesus is pointing to the heart as the true source of a person's words and actions. ἐκπορεύεται (ekporeuetai, "proceed"): This verb means to come out from or originate. The emphasis is on the origin of defiling things being inside a person, not outside. κοινοῖ (koinoi, "defile"): This word means to make common or unclean, especially in a religious sense. Jesus uses it to challenge the idea that external things (like unwashed hands) make someone unclean before God.

Question 3

Why Matthew 15:18 matters

Accepted Answer

Matthew 15:18 clarifies that spiritual defilement is an internal matter, not something caused by failing to follow external rituals or traditions. This verse challenges common misunderstandings about purity, especially among Jesus’ original audience who were focused on ceremonial laws. Matthew 15:18 connects to the wider teaching of Jesus that true righteousness is about the heart and intentions, not just outward behavior.

Matthew 15:18 (KJV)