Midlife occupies a pivotal position in the depth-psychological corpus, functioning simultaneously as a developmental threshold, a crisis of meaning, and an invitation to individuation. James Hollis provides the most sustained Jungian treatment, framing the Middle Passage as the necessary collision between the acquired personality—forged through the ego-building imperatives of first adulthood—and the deeper demands of the Self. For Hollis, the symptomatology of midlife distress (depression, rage, disillusionment, the collapse of projections onto career, marriage, and parents) is not pathology to be managed but a psychic imperative for renewal. Murray Stein situates midlife within a full lifespan metamorphosis schema, arguing that, as in biological pupation, a radical disintegration of existing structures is prerequisite to the emergence of the true self in the second half of life. Naomi Quenk approaches midlife through the lens of typological development, noting that the inferior function, long suppressed by dominant-type adaptation, makes a characteristic claim for integration at this life-stage. Jung himself, as reported by Stein and cited in the dream seminar material, saw the post-forty decades as the period when depression, loss of purpose, and the inadequacy of youthful ambitions signal the psyche’s demand for a wider spiritual horizon. Tensions persist across the corpus: whether midlife constitutes a datable crisis or a prolonged liminal process; whether its primary dynamic is the withdrawal of projections, the confrontation with mortality, or the call of the Self; and whether conscious choice or autonomous psychic pressure drives transformation.