O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.
Jesus is speaking here to the Pharisees — a highly respected group of religious leaders in first-century Jewish society, known for their meticulous observance of religious law. They had just accused Jesus of performing miracles through the power of the devil, not God. Jesus responds with striking sharpness, calling them 'a brood of vipers' — a vivid image of a nest of poisonous snakes. His argument is direct: what comes out of your mouth reveals what is actually inside you. Good words cannot come from a corrupt heart. And the words are not the real problem — they are the symptom. The disease is what is underneath them.
God, my mouth has gotten ahead of me more times than I want to count. I don't want to just manage my words — I want you to go deeper, into whatever is underneath them. Do that slow, uncomfortable work in me. Amen.
The Pharisees weren't saying obviously evil things. They were making a theological argument, wrapped in the language of religious authority. But Jesus cuts past the words to their source: your mouth is the exhaust pipe. Whatever is burning inside you — that's what comes out when the pressure builds. You don't always know what's actually in your heart until you're stuck in traffic behind someone who just cut you off, or blindsided by unexpected bad news, or alone with family for a week straight, or in the middle of a fight you didn't see coming. That's when the actual contents spill. This verse isn't primarily a call to clean up your language. It's a diagnostic tool. When words come out of you that you immediately wish hadn't — the sharp thing you said to your kid, the comment about a coworker you thought no one important would hear, the way you've talked about someone who hurt you — instead of just cleaning up the mess, Jesus is inviting you to ask a harder question: what is leaking out, and where is it coming from? The mouth is just the messenger. What is your heart actually sending?
Jesus says the mouth speaks from the overflow of the heart — what does that image of 'overflow' suggest about the relationship between your inner life and your outward words?
Think of a recent time your words surprised or embarrassed you. Looking back, what do you think they revealed about what was going on inside you at the time?
Jesus speaks very harshly here — calling religious leaders 'a brood of vipers.' Does that challenge your picture of who Jesus is? What does it tell you about him?
How do the words you use about other people — behind their backs, in casual conversation, even in your own thoughts — affect those around you in ways you might not be tracking?
What is one honest, specific practice that could help you pay more attention to what is actually going on in your heart this week — not just what is coming out of your mouth?
A good man out of the good treasure of his heart bringeth forth that which is good; and an evil man out of the evil treasure of his heart bringeth forth that which is evil: for of the abundance of the heart his mouth speaketh.
Luke 6:45
Even so the tongue is a little member, and boasteth great things. Behold, how great a matter a little fire kindleth!
James 3:5
Let no corrupt communication proceed out of your mouth, but that which is good to the use of edifying, that it may minister grace unto the hearers.
Ephesians 4:29
Not that which goeth into the mouth defileth a man; but that which cometh out of the mouth, this defileth a man.
Matthew 15:11
But those things which proceed out of the mouth come forth from the heart; and they defile the man.
Matthew 15:18
But the tongue can no man tame; it is an unruly evil, full of deadly poison.
James 3:8
For where your treasure is, there will your heart be also.
Matthew 6:21
Keep thy heart with all diligence; for out of it are the issues of life.
Proverbs 4:23
You brood of vipers, how can you speak good things when you are evil? For the mouth speaks out of that which fills the heart.
AMP
You brood of vipers! How can you speak good, when you are evil? For out of the abundance of the heart the mouth speaks.
ESV
'You brood of vipers, how can you, being evil, speak what is good? For the mouth speaks out of that which fills the heart.
NASB
You brood of vipers, how can you who are evil say anything good? For out of the overflow of the heart the mouth speaks.
NIV
Brood of vipers! How can you, being evil, speak good things? For out of the abundance of the heart the mouth speaks.
NKJV
You brood of snakes! How could evil men like you speak what is good and right? For whatever is in your heart determines what you say.
NLT
"You have minds like a snake pit! How do you suppose what you say is worth anything when you are so foul-minded? It's your heart, not the dictionary, that gives meaning to your words.
MSG