Verse explainer
A pagan prophet's oracle becomes one of Scripture's sharpest statements about why God's word, once given, cannot be reversed by anyone — including a hired curse-speaker.
God is not a man, that he should lie; neither the son of man, that he should repent: hath he said, and shall he not do it? or hath he spoken, and shall he not make it good?
BSBGod is not a man, that He should lie, or a son of man, that He should change His mind. Does He speak and not act? Does He promise and not fulfill?
The plain meaning
Balaam has been hired by Moab's king Balak to curse Israel, but every time he opens his mouth, blessing comes out instead. Verse 19 is Balaam's own explanation for why he cannot do otherwise: the God who gave the blessing is not a man who says one thing and does another, not a human being who changes his mind when circumstances shift or outside pressure mounts. The two rhetorical questions at the end land like a gavel — Has he spoken? Then it will happen. The verse is not a philosophical lecture on divine nature; it is a pointed, in-the-moment argument that Balak's whole scheme is hopeless. No fee, no better vantage point (see vv. 13–14), no number of altars and sacrifices (v. 1) can redirect what God has already said. The contrast is with human unreliability — kings who promise and renege, counselors who trim their words to what powerful men want to hear. God is not that. What he has declared over Israel stands, and Balaam, for all his reputation as a professional blesser-and-curser, can only report what he receives.
The common misreading
What the commentators say
Gill grounds the verse in the contrast between God's infinite, eternal nature and fallen human nature. Men lie because they are finite and sinful; God cannot lie because his counsels are faithfulness and truth, his promises are yes and amen. Gill also stresses that divine constancy means God never alters his affections toward his people or makes void his covenant with them — and specifically that Balak had no hope of reversing God's declared blessing on Israel.
Henry reads the verse as Balaam's honest acknowledgment that the God of Israel operates on a totally different plane from human patrons who can be pressured, bribed, or talked around. The immutability of God's word is not stubbornness but integrity: he has no new information to surprise him, no superior to overrule him, and no motive to deceive. What he said to Abraham, Isaac, and Jacob still stands, and no Moabite scheme can undo it.
Barnes draws attention to the Hebrew behind 'repent' — the word describes a change of purpose prompted by regret or new circumstances, which applies to humans who misjudge but cannot apply to an omniscient, perfectly consistent God. He notes the verse does not deny that Scripture elsewhere speaks of God 'repenting' in a phenomenological sense (as in Jonah 3:10), but here the point is absolute reliability: God's declared word about Israel will not be walked back.
The word behind it
'To repent, relent, or change one's mind' — often used of humans who feel regret and reverse course. The BSB renders it 'change His mind,' which captures the real issue: Balak is hoping God will reconsider his blessing on Israel if approached the right way. Nacham applied to God in the prophets usually describes a relenting from threatened judgment (Jonah 3:10); here Balaam insists the word works in reverse — God will not relent from a declared blessing either. The denial is contextually specific to the reliability of God's stated purpose, not a blanket claim that God never responds to prayer or repentance.
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