“Albert Einstein once said that ‘insanity’ was ‘Doing the same thing over and over again, expecting to achieve different results’. He was a clever chap, that Einstein fella. And, according to him, I must have been insane. Because I kept on working hard, and I kept on expecting to be rewarded, even though my hard work had never been rewarded before. I didn’t have any evidence to suggest that I’d be rewarded. It wasn’t a rational belief. It all came down to optimism. Blind, debilitating optimism.”