“Intelligence is the ability to adapt to change.”

“The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.”

“However difficult life may seem, there is always something you can do and succeed at.”

“We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the universe. That makes us something very special.”

“The universe doesn’t allow perfection.”

“The past, like the future, is indefinite and exists only as a spectrum of possibilities.”

“Theoretical physics is one of the few fields in which being disabled is not a handicap.”

“We are all different, but we share the same human spirit.”

“My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all.”

“I have noticed even people who claim everything is predestined, and that we can do nothing to change it, look before they cross the road.”

“I regard the brain as a computer which will stop working when its components fail. There is no heaven or afterlife for broken-down computers; that is a fairy story for people afraid of the dark.”

“Intelligence is the ability to adapt to new information.”

“The greatest scientists are always artists as well.”

“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.”

“People who boast about their IQ are losers.”

“Quiet people have the loudest minds.”

“The universe is a pretty big place. If it’s just us, seems like an awful waste of space.”

“While there’s life, there is hope.”

“If time travel is possible, where are the tourists from the future?”

“Science is not only a disciple of reason but also one of romance and passion.”

“We are on the verge of a new technological revolution that will change our views of the world and the universe forever.”

“The past is deterministic, but the future is not.”

“However bad life may seem, there is always something you can do, and succeed at. While there’s life, there is hope.”