A snake who had lain torpid all winter in his hole took advantage of
the first warm day to limber up for the spring campaign. Having tied
himself into an intricate knot, he was so overcome by the warmth of
his own body that he fell asleep, and did not wake until nightfall. In
the darkness he was unable to find his head or his tail, and so could
not disentangle and slide into his hole. Per consequence, he froze to
death.
Many a subtle philosopher has failed to solve himself, owing to his
inability to discern his beginning and his end.