A single sentence, written in a circle, it can be read over an over again because it has no beginning or end, that is, you can start reading wherever yo want and stop where you want. But there is a contradiction. All this sentence tells you is that there is an end (and if there is an end there must be a beginning too).
This dialectical opposition between its content and form is the mechanism that makes this work function.The paradox here does not disturb the meaning, but creates it.
Like a snake eating its tail i is supposed to transcend duality. Things are not complete, or whole or perfect, without the opposition of wholeness and perfection integrated inside them.