Verse explainer
The famous 'lukewarm' rebuke isn't about low enthusiasm — it's about a church so self-satisfied it had stopped depending on Christ for anything.
So then because thou art lukewarm, and neither cold nor hot, I will spue thee out of my mouth.
BSBSo because you are lukewarm—neither hot nor cold—I am about to vomit you out of My mouth!
The plain meaning
The letter is addressed to the church at Laodicea, a prosperous city whose aqueduct famously delivered water that arrived tepid and unpleasant by the time it reached the city — unlike the hot therapeutic springs of Hierapolis or the cold drinking water of Colossae nearby. Jamieson, Fausset & Brown note this geographical detail: the image would have landed with immediate force on first-century readers. Verse 17 makes the real diagnosis plain: 'Because thou sayest, I am rich, and increased with goods, and have need of nothing.' The problem isn't half-heartedness in the ordinary sense — it's a self-sufficiency so complete that the church felt no hunger for Christ's gold, raiment, or eye-salve (v. 18). The Greek phrase 'I am about to vomit' (mello emesai) carries a sense of imminent, not yet final, action — Jamieson reads this as a gracious window: repent now and the threat need not be executed. The shocking visceral image is proportionate to the danger: a community that believes it needs nothing from God is further from him than one that knows it is cold.
The common misreading
What the commentators say
Clarke links lukewarmness directly to being 'irresolute and undecided' — not a moderate position but an absence of genuine commitment. His point is that tepid water produces nausea, and the image describes being cast off: 'Thou shalt have no interest in me.' He stresses sloth and carelessness, not mere low intensity, as the heart of the failure — the church was not in earnest for its own soul.
JFB observe that 'I am about to vomit' translates a Greek construction signaling imminent but not yet final action, leaving room for repentance. They also note that cold and hot drinks were common at ancient feasts but lukewarm water was never served — it was the remedy physicians used to induce vomiting. The rebuke thus draws on a concrete local and medical reality, not just a metaphor for half-heartedness.
Gill's commentary on the surrounding counsel in vv. 18–19 emphasizes that Christ's remedy for Laodicea — gold tried in the fire, white raiment, eye-salve — is freely given to those who come to him in genuine need. The Laodicean failure, in Gill's reading, is precisely that the church's material prosperity blinded it to its spiritual poverty and its need to receive anything from Christ at all.
The word behind it
'Lukewarm.' Used only here in the New Testament. The word describes water that is tepid — not refreshingly cold, not therapeutically hot, but uselessly in-between. Thayer's Lexicon notes the root connects to warmth that has gone slack. In context the point is not a midpoint between two virtues; cold and hot are both preferable to this. The Laodicean church's tepid state is the direct result of self-sufficiency (v. 17): when you believe you need nothing, you seek nothing, and your spiritual temperature drops to useless.
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