Travelling at speed, thousands of feet above ground, in the cabin of an aircraft, induces an altered state of mind. Things that may have been puzzling you perhaps come into focus, as if the lens of a camera has been twisted. You may find, sliding into your mind, answers to questions that have long eluded you. As you gaze out at the illusory landscape of alto-stratus mountains, you may catch yourself thinking: ah, of course, I hadn’t realised that before.
