Showing itself primarily in ancient

Showing itself primarily in ancient Gnostic texts, the Ouroboros is any image of a snake, worm, serpent, or dragon biting its own tail. Generally taking on a circular form, the symbol is representative of many broad concepts. Time, life continuity, completion, the repetition of history, the self-sufficiency of nature, and the rebirth of the Earth can all be seen within the circular boundaries of the Ouroboros.
Societies from throughout history have shaped the Ouroboros to fit their own beliefs and purposes. The image has been seen in ancient Egypt, Japan, India, utilized in Greek alchemic texts, European woodcuts, Native American Indian tribes, and by the Aztecs. It has, at times, been directly associated to such varying symbols as the Roman god Janus, the Chinese Ying Yang, and the Biblical serpent in the Garden of Eden.