Reality is rich and complex, and I have suggested that part of it is always hidden from us. This is not just my take: it was, in different ways what Bacon meant when he said that ‘the subtlety of Nature is greater many times over than the subtlety of the senses and understanding’, what Heraclitus meant by saying that ‘Nature loves to hide’, what Einstein meant by ‘Nature hides her secrets’, and what Heidegger meant by ‘the clearing in which Being stands is itself at the same time concealment’.