Usually the most apt metaphor is a spiral. We’ve gone round in a big circle, it feels like we’re back in the same place, except everything is completely differe

Usually the most apt metaphor is a spiral. We’ve gone round in a big circle, it feels like we’re back in the same place, except everything is completely different due to movement in a dimension which we didn’t even perceive. And, well, you know, “words”... whatever works :-D