'I have always believed that, at a personal level, anything is possible, that if I desire to be a particular someone or do a particular something, I can. All my desires have been realistic: no hankerings for time travel or reinvention as a theoretical physicist, although both have enormous appeal. My desires have been possibilities: working as a volunteer in Africa, joining a choir, mountaineering, falling helplessly in love, winning the Booker. The only impediments would be lack of ability, lack of application, and/or lack of courage – all of which, given enough time, could be overcome.' (Introduction)