Here was the difficult concept, the moment where the snake had to swallow its own tail and turn inside out.

Caeled recognized a s snake attempting to swallow its own tail.

The Extension was a snake preventing itself from swallowing its own tail.

The knot wriggled like some huge worm, closed on itself as if swallowing its own tail.

Uncle Pan was saying, the tirade turning in on itself, like a snake swallowing its tail.

By now the novel has swallowed its own tail.

But a single electron would also interact with itself, like a snake swallowing its own tail.

The stone hands held up a symbol in the shape of a snake swallowing its own tail.

Inside the circle, made by a snake swallowing its own tail, was an image of the phoenix rising.

The being is not ring-shaped, but gives that impression because for some reason, known best to itself, it has been trying to swallow its tail.