A 15th century ourobouros contrasted with an enso, the Zen symbol of cyclicality.
To Plato, the self-consuming animal was the first beast alive. The creature represented perfection and self-sufficiency: an ideal manifested in the figure of the snake gobbling up its own tail. Interestingly, a similar symbol of regeneration and harmony was flourishing in the East: the enso.
In both versions, there's something very snake-like about the design. Serpents have long symbolized knowledge, wisdom and the paradox of being. Their venom heals and destroys. They slough off their skin, leaving behind a convincing simulation of a real creature. The dual nature of the ouroboros is similar to
that of the cross: an instrument of death which transforms into a sign of life. It speaks to the mercurial possibility that at all times, in any situation, things may flip to their opposite nature. (There's a great quote in the epigraph to Hardt & Negri's Empire: "Every tool is a weapon if you hold it right.")
Both icons capture the symbolic union of opposites. However, the enso is the more abstract version of the two, which is probably why it has survived into the 21st century as a corporate icon.
The Joseph Campbell Foundation uses the enso as their logo, which isn't really a stretch, considering the mythological nature of their pursuits. Humanized, the company of Mac inventor Jef Raskin's son Aza, just released a stunning new piece of productivity software called Enso. But it was the Lucent Technologies coffee-stain logo that catapulted the enso to pop celebrity. Here's a fascinating AIGA article on the history of Lucent's logo (or "The Brown Ring of Quality," to quote Scott Adams.)
All symbols, sacred or no, are up for grabs in the hyperreal realm of image-conscious pop couture.

