from σκληρός; callousness, i.e. (figuratively) stubbornness:--hardness.
Transliteration:sklērótēs
Pronunciation:sklay-rot'-ace
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### Core Meaning & Semantic Range
The Greek noun σκληρότης (sklērótēs, `{{G4643}}`) derives from the adjective σκληρός (sklēros, `{{G4642}}`), which means "hard," "rough," "harsh," or "severe." Literally, σκληρότης refers to a physical state of being unyielding, stiff, or impenetrable. However, its primary and almost exclusive use in biblical literature, particularly the New Testament, is figurative. In this sense, it denotes "callousness" or "stubbornness." It describes an unyielding disposition, an insensitivity, or an obstinate refusal to respond or change, particularly in the heart or mind. It signifies a spiritual or moral rigidity, a lack of pliability in one's will or conscience.
### Biblical Occurrences & Contextual Analysis
The term σκληρότης (sklērótēs, `{{G4643}}`) appears only once in the New Testament, found in [[Romans 2:5]].
In this passage, Paul confronts the self-righteous individual who judges others while practicing similar sins. He issues a severe warning: "But because of your σκληρότης and unrepentant heart you are storing up wrath for yourself on the day of wrath and revelation of the righteous judgment of God."
The phrase "hardness of heart" (σκληρότης καρδίας) directly translates σκληρότης. This hardness is presented as a consequence of despising God's kindness, forbearance, and long-suffering, which are divinely intended to lead one to repentance ([[Romans 2:4]]). Instead of yielding to God's gracious invitation, the individual's σκληρότης signifies an obstinate refusal to acknowledge sin, repent, or respond to divine grace. This self-inflicted spiritual rigidity does not mitigate guilt but rather increases condemnation, leading to a fearful accumulation of wrath for the day of judgment. This passage emphasizes human culpability in cultivating such an unyielding disposition, distinct from instances where God is said to "harden" hearts in a different sense (e.g., Pharaoh).
### Related Words & Concepts
* **σκληρός (sklēros, `{{G4642}}`):** The root adjective, meaning "hard," "harsh," or "severe." It is used to describe difficult sayings ([[John 6:60]]), a harsh master ([[Matthew 25:24]]), or the hardened heart of Pharaoh in the Septuagint (LXX), though the New Testament often employs other terms for Pharaoh's heart.
* **πωρόω (pōroō, `{{G4456}}`):** A verb meaning "to harden," "to make callous," or "to blind." This term is more frequently used in the New Testament to describe the hardening of hearts or minds, often implying either a divine allowance/cause or humanly chosen resistance. Examples include the disciples' hearts ([[Mark 6:52]], [[Mark 8:17]]), the unbelieving Jews ([[John 12:40]], [[Romans 11:7]]), and the Gentiles ([[Ephesians 4:18]]).
* **πώρωσις (pōrōsis, `{{G4457}}`):** The noun form of πωρόω, meaning "callousness," "blindness," or "insensitivity." This term is semantically very close to σκληρότης, often used interchangeably in discussions of spiritual insensitivity. It appears in contexts such as the Pharisees' hardness of heart ([[Mark 3:5]]), the partial hardening of Israel ([[Romans 11:25]]), and the blindness of heart among unregenerate Gentiles ([[Ephesians 4:18]]).
* **Old Testament Parallels:** The concept of "hardness of heart" is deeply rooted in the Old Testament. Hebrew terms like כָּבֵד (kaved, `{{H3513}}`, "heavy," implying stubbornness) or קָשָׁה (qashah, `{{H7185}}`, "hard," "stiff-necked") frequently describe human resistance to God. Pharaoh's heart is a prominent example ([[Exodus 7:3]], etc.). The prophets often lament Israel's "stiff neck" and "uncircumcised heart" ([[Jeremiah 7:26]], [[Ezekiel 3:7]]), a stubborn refusal to obey God's covenant. The New Testament concept of σκληρότης aligns perfectly with this long-standing biblical theme of human rebellion and insensitivity to divine instruction and grace.
### Theological Significance
The single occurrence of σκληρότης in [[Romans 2:5]] carries profound theological weight.
* **Human Responsibility:** It unequivocally underscores human culpability. The σκληρότης described is not a divinely imposed state but a chosen and cultivated resistance. Individuals, by despising God's abundant kindness and patience, actively contribute to their own spiritual insensitivity and unwillingness to repent.
* **Nature of Sin:** Hardness of heart is presented as a fundamental aspect of sin, representing a deliberate refusal to yield to God's truth, love, and call to repentance. It is a self-inflicted spiritual paralysis that prevents a proper response to the Gospel.
* **Divine Patience and Judgment:** The presence of σκληρότης highlights God's immense patience and forbearance ([[Romans 2:4]]). He extends grace, providing ample opportunity for repentance. However, this patience is not without limit. Persistent σκληρότης ultimately leads to divine judgment, demonstrating God's unwavering justice. The metaphor of "storing up wrath" is a stark warning.
* **Barrier to Salvation:** A hardened heart is the primary internal barrier to receiving salvation. It prevents an individual from acknowledging their sin, recognizing their need for a Savior, and responding in faith and obedience to the Gospel.
* **Contrast with a Responsive Heart:** The concept of σκληρότης implicitly contrasts with a "soft," "tender," or "responsive" heart, which is open to God's word and the leading of the Holy Spirit. This "softness" is often associated with the new covenant promise of a new heart and spirit that replaces the heart of stone ([[Ezekiel 36:26]]).
### Summary
σκληρότης (sklērótēs, `{{G4643}}`) fundamentally denotes "hardness" or "stubbornness," particularly in a spiritual or moral sense. Its singular, yet highly significant, New Testament appearance in [[Romans 2:5]] describes the "hardness of heart" that arises from despising God's kindness and forbearance, leading to an obstinate refusal to repent. This concept resonates deeply with the Old Testament theme of human rebellion and spiritual insensitivity. Theologically, σκληρότης emphasizes human responsibility for spiritual obduracy, illuminates the essence of sin as a deliberate unresponsiveness to God, and underscores the inevitable interplay between divine patience and ultimate judgment. It stands as a critical internal impediment to salvation, diametrically opposed to the responsive heart that God seeks.
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