The crescent moon occupies a distinctive position within the depth-psychology corpus as one of the most symbolically overdetermined lunar forms, functioning simultaneously as cosmological marker, archetypal image, religious emblem, and psychotherapeutic metaphor. Jung’s 1928–1930 Dream Analysis seminars establish the foundational tripartite schema — waxing crescent, full moon, dark moon — within which the crescent figures as inception, potentiality, and the anima-principle in its most culturally visible guise, associated with Islamic iconography, early Christian catacomb art, and the moon goddesses of antiquity. Moore’s Ficinian readings extend this into a phenomenology of lunar consciousness wherein the crescent-sliver stands as an archetypal image of psychological emptiness that must precede fullness, resisting the developmental bias toward perpetual growth. Neumann and the comparative mythologists locate the crescent’s horned form within the bull-moon-serpent complex of matriarchal symbolism, while Clarissa Pinkola Estés deploys the ‘crescent moon bear’ as a narrative vehicle for the instinctual wisdom women must approach with patience and offering. Greene situates the waxing crescent within astrological psychology as the phase of emerging individuation following the new moon conjunction. The central tension across these voices is whether the crescent denotes beginning (waxing toward fullness) or is better understood, as Moore insists, as one of several coexisting archetypal states of psyche rather than a sequential developmental stage.