'O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.' Jesus addresses Pharisees harshly: 'generation of vipers' (γεννήματα ἐχιδνῶν/gennēmata echidnōn, offspring of snakes)—John Baptist's same epithet (Matthew 3:7). The rhetorical question: 'how can ye, being evil, speak good things?' expects answer: you can't. Evil nature produces evil speech. The principle: 'out of the abundance of the heart the mouth speaketh' (ἐκ τοῦ περισσεύματος τῆς καρδίας τὸ στόμα λαλεῖ/ek tou perisseumatos tēs kardias to stoma lalei)—whatever fills the heart overflows through speech. Reformed theology sees this as demonstrating total depravity: evil heart inevitably produces evil expression. It also teaches that speech reveals character—what we say indicates what we are. The Pharisees' accusation (attributing Jesus's works to Satan) revealed their evil hearts. Modern application: our words—criticism, gossip, lies, blasphemy, or alternatively worship, encouragement, truth—reveal our hearts' condition.
Historical Context
Vipers were venomous snakes common in Palestine—deadly, deceptive (striking from concealment), and associated with evil. Calling Pharisees 'generation of vipers' was devastating insult questioning their spiritual legitimacy. They claimed Abraham as father; Jesus and John implied Satan was their true father (John 8:44). The heart/mouth connection was axiomatic in Jewish wisdom: Proverbs 4:23 ('Keep thy heart with all diligence; for out of it are the issues of life'), Proverbs 12:14 ('A man shall be satisfied with good by the fruit of his mouth'), Proverbs 18:21 ('Death and life are in the power of the tongue'). Jesus applied this: speech diagnostic of spiritual condition. Pharisees' evil words (attributing Spirit's work to Satan) proved evil hearts. Early church took this seriously: James 3:1-12 extensively discusses tongue's power and its revelation of heart. Throughout history, heresy trials often examined words carefully—what people say reveals what they believe. Modern psychology confirms: speech patterns reveal underlying attitudes, beliefs, values. Jesus's principle remains: listen to what people consistently say to understand their hearts.
Questions for Reflection
What does your habitual speech—words you use when unguarded—reveal about your heart's condition?
How do you cultivate heart purity knowing that speech inevitably reveals inner reality?
In what ways do Christians sometimes maintain external religious vocabulary while hearts remain far from God?
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Analysis & Commentary
'O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.' Jesus addresses Pharisees harshly: 'generation of vipers' (γεννήματα ἐχιδνῶν/gennēmata echidnōn, offspring of snakes)—John Baptist's same epithet (Matthew 3:7). The rhetorical question: 'how can ye, being evil, speak good things?' expects answer: you can't. Evil nature produces evil speech. The principle: 'out of the abundance of the heart the mouth speaketh' (ἐκ τοῦ περισσεύματος τῆς καρδίας τὸ στόμα λαλεῖ/ek tou perisseumatos tēs kardias to stoma lalei)—whatever fills the heart overflows through speech. Reformed theology sees this as demonstrating total depravity: evil heart inevitably produces evil expression. It also teaches that speech reveals character—what we say indicates what we are. The Pharisees' accusation (attributing Jesus's works to Satan) revealed their evil hearts. Modern application: our words—criticism, gossip, lies, blasphemy, or alternatively worship, encouragement, truth—reveal our hearts' condition.