“Sometimes, I think, ‘Well, why on Earth do I feel hopeful?’ Because the problems facing the planet are huge. And if I analyze them carefully, they do sometimes seem absolutely impossible to solve. So why do I feel hopeful? Partly, because I’m obstinate. I just won’t give in. But it’s partly also because we cannot accurately predict what the future might bring. We simply can’t. No one can know how it will all turn out.”
