“To lose someone you love is the very worst thing in the world. It creates an invisible hole that you feel you are falling down and will never end. People you love make the world real and solid and ...”

“Minds have their own weather systems. You are in a hurricane. Hurricanes run out of energy eventually. Hold on.”

“The key to happiness - or that even more desired thing, calmness - lies not in always thinking happy thoughts. No. That is impossible. No mind on earth with any kind of intelligence could spend a l...”

“MINDS ARE UNIQUE. They go wrong in unique ways. My mind went wrong in a slightly different way to how other minds go wrong. Our experience overlaps with other people's, but it is never exactly the ...”

“But it only takes a doubt. A drop of ink falls into a clear glass of water and clouds the whole thing. So the moment after I realised I wasn't perfectly well was the moment I realised I was still v...”

“What doesn't kill you very often makes you weaker. What doesn't kill you can leave you limping for the rest of your days. What doesn't kill you can make you scared to leave your house, or even your...”

“I don't view Twitter as a promotional tool but as a really, really, really cool cocktail party.”

“I've come to a view that humans will continue to do what we do well, and that computers will continue to do what they do very well, and the two will coexist, but in different spaces.”

“From a commercial point of view, if Christmas did not exist it would be necessary to invent it.”

“My mind," he said, "rebels at stagnation. Give me problems, give me work, give me the most abstruse cryptogram or the most intricate analysis, and I am in my own proper atmosphere. I can dispense t...”

“Running is a mental sport, more than anything else. You're only as good as your training, and your training is only as good as your thinking.”

“Everything has been created twice once on a mental plain and once on a physical plain.”