Psychic equilibrium occupies a structurally pivotal position across the depth-psychology corpus, functioning simultaneously as a regulative ideal, a diagnostic criterion, and a developmental telos. Jung formulates the concept with the greatest systematic rigour, grounding it in an energic model derived from thermodynamics: the psyche, understood as a relatively closed system, tends toward equalization of opposing forces, and this levelling constitutes the foundation of stable psychological attitudes. Crucially, for Jung, equilibrium is not stasis but a dynamic tension maintained between ego and non-ego, conscious and unconscious — a ‘religio,’ a careful consideration of ever-present unconscious forces whose neglect produces collective and individual pathology. Rudhyar extends this framework into transpersonal territory, locating equilibrium at the ‘centre of gravity’ of the whole-nature, a position neither detached nor overwhelmed by any intensified psychic function. Kalsched approaches the concept from a trauma-theoretic angle, identifying wounds to psychic equilibrium as the originary condition of dissociation and defensive archetypal constellations. Flores, drawing on Kohut, identifies the capacity to regulate narcissistic equilibrium internally as the hallmark of mature psychic structure, distinguishing it from dependency on external self-objects. Taken together, these voices reveal a central tension in the literature: whether equilibrium is best understood as a homeostatic baseline to be restored, or as a higher synthetic achievement — the hard-won product of individuating opposites.