Numbers 23:19 and the Deity of Jesus
Numbers 23:19 declares, "God is not a man, that he should lie, nor a son of man, that he should change his mind. Does he speak and then not act? Does he promise and not fulfill?" This verse appears in Balaam's second oracle, where the pagan prophet—hired to curse Israel—finds himself compelled to bless them instead. The immediate context emphasizes God's immutable character: because God has blessed Israel, Balaam cannot reverse that blessing [2]. The verse functions as a theological axiom about divine reliability, contrasted with human fickleness.
The Interpretive Challenge
The phrase "God is not a man" has generated discussion in Christian theology because the New Testament identifies Jesus as both fully God and fully human. Critics have sometimes cited Numbers 23:19 to argue against the incarnation, suggesting a contradiction between the Old Testament's denial that God is human and the New Testament's affirmation that the Word became flesh. The question hinges on what the text denies and what the incarnation affirms.
What the Text Denies
Numbers 23:19 does not deny that God can become human or take on human nature. Rather, it denies that God shares the moral limitations characteristic of fallen humanity—specifically, lying and inconstancy [1]. The parallelism clarifies this: "God is not a man, that he should lie" pairs with "nor a son of man, that he should change his mind." The focus is behavioral, not ontological. The verse asserts God's faithfulness in contrast to human unreliability, a theme echoed throughout Scripture in passages like 1 Samuel 15:29, Malachi 3:6, and Titus 1:2 [1].
The Incarnation and Divine Immutability
Christian theology has historically distinguished between God's nature and God's assumption of human nature. The Heidelberg Catechism addresses this directly: "Since divinity is not limited and is present everywhere, it is evident that Christ's divinity is surely beyond the bounds of the humanity that has been taken on, but at the same time his divinity is in and remains personally united to his humanity" [3]. In the incarnation, the eternal Son takes on human nature without ceasing to be God or compromising divine attributes like truthfulness and immutability.
The New Testament presents Jesus as receiving worship—an act reserved for God alone—in passages such as Matthew 2:2, 8:2, and 28:9 [4]. This identification of Jesus as God does not contradict Numbers 23:19 because Jesus, though truly human, does not lie or change his mind in the manner the verse condemns. His humanity is sinless, united to his divine nature in one person.
Sources
- Treasury of Scripture Knowledge “Numbers 23:19 cross-references: Genesis 26:3, Numbers 14:35, Joshua 21:45, 1 Samuel 3:12, 1 Samuel 15:29, 1 Kings 14:11, 2 Kings 7:2, 2 Kings 15:12, 1 Chronicles 17:17, Psalms 77:9, Psalms 89:35, Psalms 132:11, Isaiah 21:17, Jeremiah 4:28, Daniel 4:28, Hosea 11:9, Micah 7:20, Habakkuk 2:3, Malachi 3:6, Luke 21:33, Romans 11:29, Titus 1:2, Hebrews 6:18, James 1:17”
- Numbers (Protestant academic) “Tyndale House on Numbers 23:19: 23:19 Because of God’s reliable character, Balaam could do nothing but bless Israel.”
- Heidelberg Catechism (Reformed) “Heidelberg Catechism (Reformed, 1563), Q. If his humanity is not present: Q. If his humanity is not present wherever his divinity is, then aren’t the two natures of Christ separated from each other? A. Certainly not. Since divinity is not limited and is present everywhere,1 it is evident that Christ’s divinity is surely beyond the bounds of the humanity that has been taken on, but at the same time his divinity is in and remains personally united to his humanity.2 1 Jer. 23:23-24; Acts 7:48-49 (Isa. 66:1) 2 John 1:14; 3:13; Col. 2:9 Q & A 49”
- Matthew (Protestant academic) “Tyndale House on Matthew 2:2: 2:2 Matthew regularly describes Jesus as receiving worship (2:2, 8, 11; 8:2; 9:18; 14:33; 15:25; 20:20; 28:9, 17), thus identifying Jesus as God.”