The term ‘calling’ occupies a pivotal position within the depth-psychological corpus, functioning simultaneously as a phenomenological description, an ontological claim, and a therapeutic challenge. Hillman’s acorn theory, elaborated in The Soul’s Code, provides the most systematic treatment: calling is the daimon’s demand upon a life, the soul’s code pressing toward its own realization against the flattening forces of genetics, environment, and victim-mentality. For Hillman, calling is not a career aspiration but an invisible necessity — present in earliest childhood behavior, recurring at adolescence, and intensifying in late adulthood when ‘fate’ becomes inescapable. The price it exacts on family, body, and conventional decency is documented unflinchingly. Heidegger’s parallel but philosophically distinct treatment in Being and Time construes the call as conscience’s discourse — Dasein calling to itself, disclosing its own Being-guilty in a mode that cuts through the ‘hubbub’ of idle talk. Hollis situates the call within the midlife transition, distinguishing vocation from mere job and linking it to the individuation imperative. Hillman further complicates the picture by insisting that mediocrity, marriage, and serial relationship each carry their own form of calling, resisting elitist hierarchies of destiny. The tensions among these positions — between immanent soul-code and existential self-address, between singular vocation and plural forms of calling — constitute the productive friction that makes this term irreducible.