Imagine looking at the world in front of you. A few feet or a few miles away, everything is still tangible, within your grasp. Now its night. Look up a little and you’ll see the stars. They’re a long way away, but the distance is still measurable. But tip your head a little further back and suddenly all of infinity is there arching back in an involute spiral; you’re drawn into it and immersed in it yet it recedes away from you for ever; you shrink to nothingness. Holding in your mind at one and the same time your own extreme smallness and something that feels like a direct experience of the universe’s unfathomable infinity.