For it was of the LORD to harden their hearts, that they should come against Israel in battle, that he might destroy them utterly, and that they might have no favour, but that he might destroy them, as the LORD commanded Moses.
This verse presents one of Scripture's most challenging doctrines: divine hardening of hearts unto judgment. The phrase 'it was of the LORD to harden their hearts' (ki meYahweh haytah lechazzeq et-libam, כִּי מֵיהוָה הָיְתָה לְחַזֵּק אֶת־לִבָּם) attributes heart-hardening directly to divine agency. The verb chazaq (חָזַק, 'harden') means to strengthen, make firm, or obstinate. God actively strengthened Canaanite resistance 'that they should come against Israel in battle.' The purpose clauses reveal divine intent: 'that he might destroy them utterly...that they might have no favour...that he might destroy them.' The Hebrew lemaan (לְמַעַן, 'that') introduces divine purpose—hardening served judgment. The phrase 'as the LORD commanded Moses' roots this destruction in previous divine mandate (Deuteronomy 7:1-2, 20:16-18). From a Reformed perspective, this demonstrates God's absolute sovereignty including judicial hardening of sinners for just judgment. Romans 9:17-18 cites Pharaoh's hardening as parallel case, teaching that God hardens whom He wills for His purposes. Canaanite civilization had reached full iniquity (Genesis 15:16), warranting divine judgment executed through Israel.
Historical Context
The Canaanites' seven nations had occupied the land for centuries, their wickedness including child sacrifice to Molech, ritual prostitution, and pervasive idolatry (Leviticus 18:21-30, 20:2-5, Deuteronomy 12:31). God had warned Abraham that Amorite iniquity must reach full measure before judgment (Genesis 15:16)—four centuries later, that measure was complete. The hardening of Canaanite hearts ensured they would resist Israel militarily rather than surrender or flee, facilitating complete destruction as God commanded. This parallels Pharaoh's hardening (Exodus 7-14) where God strengthened Pharaoh's resolve to resist, bringing more severe judgments revealing divine glory. Ancient Near Eastern conquest narratives typically attributed victory to superior deity's power; Joshua uniquely presents God orchestrating enemy resistance to ensure judgment's thoroughness. Archaeological evidence shows widespread destruction of Late Bronze Age Canaanite cities, though debates continue regarding dating and attribution. The theological principle established here—God hardens hearts for judgment while remaining just—runs throughout Scripture: Pharaoh (Exodus 4:21), Sihon (Deuteronomy 2:30), Romans 9:18. God's sovereignty includes judicial hardening as righteous response to persistent sin.
Questions for Reflection
How does divine hardening for judgment challenge your understanding of free will and God's sovereignty?
What does God's patience in waiting for full iniquity before judging Canaan teach about His justice and mercy?
How should we understand God hardening hearts while maintaining human accountability for sin?
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Analysis & Commentary
This verse presents one of Scripture's most challenging doctrines: divine hardening of hearts unto judgment. The phrase 'it was of the LORD to harden their hearts' (ki meYahweh haytah lechazzeq et-libam, כִּי מֵיהוָה הָיְתָה לְחַזֵּק אֶת־לִבָּם) attributes heart-hardening directly to divine agency. The verb chazaq (חָזַק, 'harden') means to strengthen, make firm, or obstinate. God actively strengthened Canaanite resistance 'that they should come against Israel in battle.' The purpose clauses reveal divine intent: 'that he might destroy them utterly...that they might have no favour...that he might destroy them.' The Hebrew lemaan (לְמַעַן, 'that') introduces divine purpose—hardening served judgment. The phrase 'as the LORD commanded Moses' roots this destruction in previous divine mandate (Deuteronomy 7:1-2, 20:16-18). From a Reformed perspective, this demonstrates God's absolute sovereignty including judicial hardening of sinners for just judgment. Romans 9:17-18 cites Pharaoh's hardening as parallel case, teaching that God hardens whom He wills for His purposes. Canaanite civilization had reached full iniquity (Genesis 15:16), warranting divine judgment executed through Israel.