Radiance, then, is not only one of the qualities of the beautiful but constitutes its actual being. The distinguishing mark of the beautiful–namely that it immediately attracts the desire if the human soul–is founded in its mode of being. Beauty is not simply symmetry but appearance itself. It is related to the idea of ‘shining’ . . . To shine means to shine on something, and so to make that on which the light falls appear. Beauty has the mode of being of light.
—Truth and Method