What Does Matthew 12:34 Mean?
You offspring of vipers, how can you, being evil, speak good things? For out of the overflow of the heart the mouth speaks.
Key words are shown with the Hebrew or Greek and what each word meant.
Selah Decoded Version The Selah Decoded Version renders what the Hebrew and Greek words meant to the people who first heard them.
King James wording
King James Version
O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.THE KEY
Your words are not the first movement; they are the overflow of what already fills your heart.
THE MEANING
What fills your heart comes out through your mouth; speech makes the inner store audible. The verse names the source as evil and presses the contradiction: how can that source speak good things?
WHAT THIS UNDOES
The lie is that polished words alone can prove the source beneath them is good.
THE ROOT
περίσσευμα
perísseuma
GROWS FROM
περισσ-
periss-
To exceed what is usual; what remains beyond the measure is surplus or overflow.
“overflow” in this verse is perísseuma. “Abundance” here is not simply a large quantity of words: it is what spills out because the heart already holds more than the mouth can contain. The Greek word belongs to the same family as the verbs and adjectives for abounding and exceeding.
ALSO GROWS
perisseúō: To abound, overflow, or have more than enough.
περισσεύω
The related verb makes the image active: the heart’s surplus flows outward in speech.
perissós: Exceeding, abundant, or more than necessary.
περισσός
This branch keeps the sense of excess: the mouth gives voice to what is already overfull.
καρδία
kardía
GROWS FROM
καρδ-
kard-
Heart; the inner center or core of a person.
The heart is presented as the interior source from which speech comes, not merely as a passing feeling. Greek compounds show this same heart can be hardened or known, so its condition is deeper than what the mouth happens to say.
ALSO GROWS
sklērokardía: Hardness of heart.
σκληροκαρδία
This compound shows the heart as an inner center that can take on a condition, illuminating why the verse traces speech back to its source.
kardiognṓstēs: One who knows hearts.
καρδιογνώστης
This compound presents the heart as something knowable beneath appearances; the mouth reveals its overflow, while the heart remains the deeper source.
THE PATTERN
Words emerge from the inner store, making speech a disclosure of what fills a person.
Above every watch you keep, guard your heart, for from it flow the springs of life.A good human brings out good from the good treasure of the heart, and an evil human brings out evil from the evil treasure of the heart, for from the overflow of the heart his mouth speaks.Out of the same mouth comes forth blessing and curse. My brothers, these things ought not to be so.THE THREAD
A good human brings out good from the good treasure of the heart, and an evil human brings out evil from the evil treasure of the heart, for from the overflow of the heart his mouth speaks.Luke repeats the same Greek word for “abundance” and the same words for “heart” and “mouth.” It makes the image explicit: speech is what the heart’s inner store brings forth.
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