The examination of the metaphysics of light makes an essential contribution to the understanding of the Greek conception of the world. Intelligible light, which is not an “analogue” (ἀνάλογον) but the “paradigm” (παράδειγμα) of sensible-perceptible light, reveals the orderliness and knowability of things. In other words: the orderliness of things manifests itself in light. The Idea is light qua being; through its light, it becomes understandable to us.