I kept walking. I turned another curve in the spiral and finally took a moment to glance up at the sky. There it was. Whatever else was happening, the sky was there, inky and inviting. I kept walking. But then suddenly, the experience washed over me a second time. I can’t tell where I am. I can’t tell where the buildings are, or where the river is or which way is north. How will I even know if I have made it all the way around? Moments after that, my eyes fixated on the stones of the spiral I was completing, and I knew I was back where I had started. I stepped out of the labyrinth, looked up at the sky and began to sing – just like I had done almost a hundred times before. But I knew something exceptional had happened.