The term ‘formless’ occupies a structurally pivotal position in the depth-psychology corpus, functioning simultaneously as a designation for primordial substrate, transcendent ground, and psychic undifferentiation. Plotinus treats the formless with characteristic precision: Matter is apprehended as ‘shapelessness, colourlessness, the unlit,’ a void that the mind encounters when it strips away all positive attributes, while the Intellectual realm yields a ‘formless Form’ beautiful precisely through the negation of all imposed shape. Augustine inherits a cognate problem in his exegesis of Genesis, where ‘formless matter’ names the chaotic substrate — invisible, without order, without light — from which created things are distinguished by divine forming activity. Sri Aurobindo inverts the privative reading: form is ‘the inevitable self-revelation of the formless,’ and the Infinite, though nameless and in that sense formless, contains all possible names and forms as latent potentialities. The Bhagavad Gita commentary amplifies this ontological hierarchy by positing an ‘unmanifested Reality’ that transcends even the formless cosmic state. In Gnostic cosmology (Jonas), residual formlessness figures as the product of Sophia’s fall — an ‘abortion’ requiring redemptive in-formation by Christos. Patricia Berry introduces the clinical register: in Jungian terms the collective appears as ‘formless energy’ when archetypes lose their organizing propensity, a condition indexed by dictatorial psychic splitting. Across these traditions, the formless is never mere absence; it is pregnant potentiality, metaphysical ground, or pathological dissolution — a tension that gives the term its enduring theoretical weight.