Stephen Hawking — "The world would be a much better place if everyone had a clear, rational view of…"

"The human race is a single genetic stock, and we are all brothers and sisters. It's time that we started to act like it."

"The universe doesn't allow perfection."

"It is a waste of time to be angry about my disability. One has to get on with life and I haven't done badly. People won't have time for you if you are always angry or complaining."

"Finally, a question about something important. My advice to any heartbroken young girl is to pay close attention to the study of theoretical physics. It would not be beyond the realms of possibility t…"

"I think the universe is a beautiful place, and I'm very lucky to be able to explore it."