📖 Biblical Definition
"Build on sand" comes from the closing parable of the Sermon on the Mount (Matthew 7:24-27; Luke 6:46-49). The wise man hears Christ’s words and does them, building his house on the rock; the foolish man hears Christ’s words but does not do them, building on sand. When the rain, floods, and winds come — and they always come — the rock-house stands; the sand-house falls, "and great was the fall of it". The contrast is not hearing versus not-hearing; it is hearing-and-doing versus hearing-without-doing. James echoes the warning: "Be ye doers of the word, and not hearers only, deceiving your own selves" (James 1:22). Hear; obey; survive the storm.
📜 Webster 1828 Definition
Mt 7:24-27: foolish man hears but does not do; storm collapses house.
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The closing parable of the Sermon on the Mount (Matt 7:24-27; par. Luke 6:46-49). Two builders: the wise man hears Christ's sayings AND does them, building on the rock; the foolish man hears the sayings but does NOT do them, building on the sand. The storm comes (rains, floods, winds beat upon both houses). The rock-house stands; the sand-house falls — "and great was the fall of it" (the sentence's emphatic close). The contrast is not believer vs unbeliever per se but hearer-and-doer vs hearer-only. James 1:22-25 develops the same theme: be doers of the word, not hearers only.
📖 Key Scripture
Matthew 7:24-27 — "Therefore whosoever heareth these sayings of mine, and doeth them, I will liken him unto a wise man, which built his house upon a rock... And every one that heareth these sayings of mine, and doeth them not, shall be likened unto a foolish man, which built his house upon the sand: And the rain descended, and the floods came, and the winds blew, and beat upon that house; and it fell: and great was the fall of it."
Luke 6:46 — "And why call ye me, Lord, Lord, and do not the things which I say?"
James 1:22 — "But be ye doers of the word, and not hearers only, deceiving your own selves."
⚠️ Modern Corruption
Read just as good vs bad foundation; the precise diagnosis is hearing-without-doing.
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Children's Bible reading is wise builder good, foolish builder bad. Christ's diagnosis is sharper: BOTH builders heard the sayings. The difference is doing them. The foolish builder is not the unbeliever who never heard; he is the hearer who never did.
Recover the precision: hearing-only is the danger. Lord, Lord without doing is the failure-mode. The storm reveals which kind of hearer you were.
🔗 Greek & Hebrew Roots
Greek akouō kai poieō.
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['Greek', 'G191', 'akouō', 'to hear']
['Greek', 'G4160', 'poieō', 'to do, make']
Usage
"Hear AND do."
"Hearing-only is the failure-mode."
"Storm reveals which hearer you were."