The term ‘past’ occupies an unusually contested position within the depth-psychology corpus, functioning simultaneously as the object of therapeutic excavation, the ground of determinism, the site of reconstitution, and a philosophically unstable dimension of lived time. Freud’s uncompromising determinism — the past as sovereign cause of present suffering — generates what Yalom identifies as ‘the seeds of therapeutic despair’: if the past fully determines the present, transformation becomes conceptually incoherent. Against this, existential and phenomenological voices insist that the past does not simply cause the present but is itself constituted by the present subject standing against a horizon of futurity. Merleau-Ponty demonstrates that the past cannot be stored as a mere trace; it must be actively held in a living subject who already carries a sense of temporality. Augustine’s meditation on time as a distension of the soul anticipates this: only the present is real, and ‘past’ names a present act of memory. Bergson and McGilchrist push further, arguing that the brain’s primary function is not to remember but to abolish memory — the past ‘endures’ in a perpetual present. Rothschild introduces a practical clinical tension: the past, being ontologically stable (‘what happened, happened’), may be overvalued as therapeutic terrain relative to present and future functioning. EMDR’s Shapiro proposes liberation from the past as the explicit therapeutic goal. Von Franz, reading through dream structure, maps past, present, and future onto dramatic phases of the unconscious communication itself, giving the past a prospective as well as retrospective significance.