Thought goes forwards, striving to get better, closer, more predictive, whether by dialectic or Bayesian updating, the arrow progresses. The alternative is to go nowhere, zen style, thesis, antithesis, thesis - not even a return but you can think of it as a rediscovery, if you want. Or best of all to go backwards: what is it that makes both thesis and antithesis possible and partakes of neither, allowing the very distinction and its supposed ground to melt away? It was never there, the whole mechanism with all its epicycles belongs to a dream. The step beyond is the step back.