Sometimes I wonder if I'm as famous for my wheelchair and disabilities as I am for my discoveries.

Time can behave like another direction in space under extreme conditions.

Intelligence is the ability to adapt to change.

So remember to look up at the stars and not down at your feet. Try to make sense of what you see and hold on to that childlike wonder about what makes the universe exist.

The thing about smart people is that they seem like crazy people to dumb people.

It is all right to make mistakes; nothing is perfect because with perfection, we would not exist.

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.

People won't have time for you if you are always angry or complaining.

It is reasonable to ask who or what created the universe, but if the answer is God, then the question has merely been deflected to that of who created God.

It is very important for young people keep their sense of wonder and keep asking why.

The development of full artificial intelligence could spell the end of the human race.

I stared at her. Maybe I wasn't the brightest guy in the world when it came to girls, but I was pretty sure Rachel had just dumped me, which was lame considering we'd never even been together.

Once established, reputations do not easily change.

With eyes of faith consider the greatness of your mission and the wonderful amount of good which you can accomplish.

One of my good friends said, in a reggae riddim, don't jump in the water if you can't swim.

If I'm president, we will win on everything we do.

They [terrorists] are trying to evoke sympathy for themselves. They're not sympathetic people. They're violent, cold-blooded killers who are trying to stop the advance of freedom.

Yet she felt an impostor, and already the mask had begun to bite into her face.

Wraith rubbed his hands together in cheesy horror-movie glee. “Join us or die.” He grinned. “I’ve always wanted to say that.

People in pain don’t always see things as clearly as they should.

What always seems miraculous is when aesthetic necessities yield an insight which otherwise I would have missed.