It is tribute to how far we have come in theoretical physics that it now takes enormous machines and a great deal of money to perform experiments whose results we can not predict.

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.

God is never far from His people, even when they are far from Him.

We become what we believe

You can't win an argument with an argument.

Life with books makes my world complete.

I’ve known a boy. I’ve measured beauty. What more do I want?

A man of science doesn't discover in order to know, he wants to know in order to discover.

We must recall the most important of humanity guidelines: Be polite. Being polite is possibly the greatest daily contribution everyone can make to life on Earth.

To take pride in a library kills it. Then, its motive power shifts over to the critical if admiring visitor, and apologies are necessary and acceptable and the fat is in the fire.

People feel certain things. Hispanics feel certain things towards blacks. Blacks feel certain things towards other groups. It's been that way historically and it will always be that way.

Shared laughter creates a bond of friendship.