Job experiences a profound depth of brokenness, physical agony, and humiliation. Consumed by heavy mourning, he strips away every trace of personal comfort and dignity, replacing them with the harshest symbols of grief while intentionally afflicting his battered body. Instead of wrapping his healing, scabbed wounds in soft fabrics to ease the pain, he sews rough sackcloth directly over his sores to reflect the sheer intensity of his sorrow [מצודת דוד].
A different perspective suggests this behavior is not a reaction to his current suffering, but rather a description of his private conduct during his years of wealth and success. To counter accusations that he lived a life of arrogance and luxury, this view explains that even at the height of his prosperity, he secretly wore tight sackcloth against his skin. This hidden practice was meant to prevent self-indulgence and subdue his pride without making a public show of his piety [אלשיך].
Job further expresses his devastation by lowering his very essence into the dirt. The primary approach among commentators is that he takes his personal glory, radiance, and honor, and intentionally dirties them in the dust, subjecting himself to absolute disgrace [רש"י, מצודת ציון, רמב"ן]. Others view this as a literal, physical act of mourning, where he scoops dust directly onto his head [רלב"ג, מלבי"ם, ביאור שטיינזלץ]. This action is understood either as the physical lifting of dirt upon himself or as a deliberate injustice he commits against his own body [אבן עזרא].
Looking again through the lens of extreme modesty, his choice to use dust rather than ashes carries deep significance. Dust, unlike ashes, does not leave a lingering, visible mark on the skin. By choosing to roll in dust, he avoids any outward display of his lowliness, ensuring his humility remains a private truth rather than a public spectacle of religious pride [אלשיך].