Within the depth-psychology corpus, ‘Beautiful’ occupies a position far exceeding mere aesthetic predication: it functions as an ontological marker, a psychological telos, and a therapeutic category. The classical inheritance is decisive. Plato, in both the Phaedo and the Symposium, grounds beauty in participation in an Absolute Form, making it the proper object of eros and the ladder to the Good. Plotinus extends this into a psychology of ascent, insisting that the soul recognizes beauty by an inner resonance — ‘what do you feel when you yourselves are beautiful within?’ — thereby internalizing the Beautiful as a criterion of psychic health. Neoplatonic cosmology then threads through Sufi mysticism (Ibn ‘Arabi’s woman as mirror of Divine Qualities), Orthodox spirituality (the Philokalia’s ‘love of the beautiful’ as the title-concept of its entire program), and Jungian archetypal psychology, where Hillman argues that beauty belongs irreducibly to the image and that psychology ‘deadens’ when it bypasses the beautiful in favor of causal explanation. Thomas Moore situates beauty explicitly as ‘the face of the soul,’ diagnostic of soul-neglect when absent from a culture. McGilchrist grounds aesthetic response neurologically in right-hemisphere processing, linking beauty to symmetry, harmony, and the golden ratio. Nietzsche and Menninghaus introduce productive tensions, questioning whether the beautiful calms or arouses the will, and whether ‘beauty’ names an emotion or an attributed virtue. The term thus bridges metaphysics, psychology, neuroscience, and spiritual practice.