‘Last night I was transported to a thin bar of sand in the middle of the ocean. The sand could only just be seen above the surface of the water; different currents pushed from east and west. The motorboat came from the east. Once on this margin of land would I take another boat and go onto the west, into the unknown, or seek to return to the east the way I had come? This margin of land represented decisions: how small, often marginal, changes can make all the difference.’
