“What I've learned from running is that the time to push hard is when you're hurting like crazy and you want to give up. Success is often just around the corner.”

“In order to fix it, you need a passionate anger about something that doesn't work well.”

“The Internet is like alcohol in some sense. It accentuates what you would do anyway. If you want to be a loner, you can be more alone. If you want to connect, it makes it easier to connect.”

“Now... Just run.' [said the Doctor.]One of the things you learn very quickly around the Doctor is never to question him when he says that word. You just run. It's almost like breathing.”

“Memory was a story you told yourself about yourself, extrapolated from a tiny dot-matrix of facts.”

“Imagine life as a game in which you are juggling some five balls in the air. You name them - work, family, health, friends and spirit - and you're keeping all of these in the air. You will soon understand that work is a rubber ball. If you drop it, it will bounce back. But the other four balls - family, health, friends and spirit - are made of glass. If you drop one of these, they will be irrevocably scuffed, marked, nicked, damaged or even shattered. They will never be the same. You must understand that and strive for balance in your life.”

“To give us room to explore the varieties of mind and body into which our genome can evolve, one planet is not enough.”