The depth-psychology corpus engages ‘hard’ across several intersecting registers that together illuminate why the term carries such weight in the tradition. At the etymological-philological level, Benveniste traces the Indo-European root of ‘hard’ (Greek kratús, Gothic hardus) as a physical-material quality — solidity, resistance, impenetrability — rigorously distinguished from the political-moral lexeme kratos (power, dominion), even as Greek usage allowed a contamination between the two families through kraterós. This philological distinction matters psychologically: hardness and authority are not the same thing, though they may masquerade as each other. In Nietzsche, ‘hard’ becomes an imperative and a mark of Dionysian creative nature: ‘become hard!’ names the capacity to destroy in order to form, and the hammer’s hardness is explicitly the condition of artistic creation. Zarathustra simultaneously problematizes the hardness imposed from without — the heavy burdens of inherited values that make ‘life hard to bear.’ In Wang Bi’s I Ching commentary, hard and soft (gang and rou) name the foundational polarity of earthly form, correlative to yang and yin in the heavenly register. In the therapeutic literature (ACT, Buddhist-influenced depth approaches), hardness figures as the experiential texture of psychological difficulty — the hard work of attention, of not fleeing suffering. Across all these registers, hardness marks a threshold: between yielding and resistance, between imposed weight and forged strength.