📖 Biblical Definition
A hard heart is one calloused by repeated sin and unwilling to repent — deaf to God’s voice, blind to His warnings, settled in unbelief. The figure runs the whole Bible: Pharaoh’s heart hardened against Moses (Exodus 7-14); Israel’s heart hardened in the wilderness (Psalm 95:8); the Pharisees’ hearts hardened against Christ (Mark 3:5). Hebrews 3-4 repeatedly warns the New-Covenant church: "To day if ye will hear his voice, harden not your hearts." Hardening is gradual — each refusal of conviction tightens the surface until the conscience no longer registers. The remedy is immediate response: hear, repent, soften, return. Christian men must examine themselves regularly for the first cracks of indifference; what is left unsoftened soon hardens to stone.
📜 Webster 1828 Definition
Webster 1828: a heart insensible to conviction, stubborn against God's word.
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Hardening is gradual—sin's deceitfulness layers callus upon callus until the conscience no longer registers the warning. Pharaoh hardened his heart, and then God hardened it further.
📖 Key Scripture
Hebrews 3:7 — "Today if ye will hear his voice, harden not your hearts."
Hebrews 3:13 — "Lest any of you be hardened through the deceitfulness of sin."
Exodus 8:32 — "Pharaoh hardened his heart at this time also."
Mark 6:52 — "For their heart was hardened."
⚠️ Modern Corruption
Our culture mistakes hardness for strength; Scripture calls it spiritual death.
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The world celebrates the hard man, the one who feels nothing and bows to no one. Stoicism has been baptized as virtue.
Scripture calls this what it is—deafness to God. The hard heart cannot repent, cannot believe, cannot love.
🔗 Greek & Hebrew Roots
Hebrew qashah (to be hard) and Greek sklērokardia (hard-heartedness).
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H7185 — Qashah — to be hard, severe, fierce
G4641 — Sklērokardia — hardness of heart
Usage
"Today if ye will hear His voice, harden not your hearts."
"Sin's deceitfulness lays callus upon callus."
"A hard heart cannot repent until grace breaks it."