The ouroboros depicts a serpent — or sometimes a dragon — biting or swallowing its own tail, forming a closed circle. The image is simultaneously one of destruction and creation: the serpent feeds on itself and yet does not diminish; it perpetually renews itself through its own consumption. This paradox is the symbol's entire meaning — stated not in words but in the visual logic of a single image that cannot be misread.
The most famous version, found in a 14th-century BCE Egyptian royal tomb (the Enigmatic Book of the Netherworld from the tomb of Tutankhamun's grandfather), depicts a doubled ouroboros — two serpents, one biting the other's tail — surrounding the text ἓν τὸ πᾶν in its later Greek form: "The All is One." This inscription, which appears in Hellenistic alchemical manuscripts attributed to Cleopatra the Alchemist, makes explicit what the image implies: the circular serpent is the cosmos consuming and renewing itself, the one reality underlying all apparent multiplicity.
The form is a circle — but not an ordinary geometric circle. The ordinary circle is static; the ouroboros is dynamic. It is a circle in process — a circle that is continuously making and unmaking itself, that exists only as long as the movement continues. Stop the serpent, and the circle dies. This is the teaching: existence is not a fixed state but a continuous process, and what we call "life" and "death" are not opposites but phases of a single, uninterrupted movement.