I realised a long time ago that a hole appears around you as you walk in nature – if you stop and sit for twenty minutes and move nothing but your eyes it will fill in again and you’ll see and hear all sorts of things. I’d thought that was because birds and animals were naturally wary of a moving human and only gradually went back to what they were doing before. But I realised today that it’s me who changes too. If I sit still and observe for twenty minutes the breathing slows, the body disappears. Things come and go without undue physical or mental reactions. It’s a form of meditation that opens you out to the world.