In Britain, like most of the developed world, stem-cell research is regarded as a great opportunity. America will be left behind if it doesn't change policy.

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.

Philosophy of science is about as useful to scientists as ornithology is to birds.

It is the ant, not the lion, which the elephant fears.

I was physically attacked by a woman who didn’t even know me. Yes, my boyfriend was her former husband, but she tried to ruin me.

Fear betrays unworthy souls.

The writing is hard, and the drawing is fun. It's very satisfying to see a drawing start to come together.

Work harder than everybody. You're not going to get it by whining, and you're not going to get it by shouting, and you're not going to get it by quitting. You're going to get it by being there.

When a church is spending more of its budget on media than shepherding, something is out of whack. We have gotten things twisted around.

If you're out there and need help, please seek it. Be proud of your valiant day-to-day struggle. There is no shame in needing support.

For the more a man limits himself, the nearer he is on the other hand to what is limitless.

I'm not a big fan of the Rock and Roll Hall of Fame. It's just a personal thing, not an ego thing.