Every man should marry. After all, happiness is not the only thing in life.

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.

Man is a credulous animal, and must believe something; in the absence of good grounds for belief, he will be satisfied with bad ones.

In death itself there can be nothing terrible, for the act of death annihilates sensation; but there are many roads to death, and some of them justly formidable, even to the bravest.

Nothing is more American than stuffing your face with loaded potato skins while drinking loaded mudslides.

No president can easily commit our sons and daughters to war.

The best years are the forties; after fifty a man begins to deteriorate, but in the forties he is at the maximum of his villainy.

As expected: she, the daughter of the Fall, recipient of its heaviest radiation, loved atomically.

To write for children at all is an act of faith.

We cannot with all our heart forgive someone who does us wrong unless we possess real knowledge. For this knowledge shows us that we deserve all we experience.

I'm a pretty calm person. That came from living in Italy for a long time. Nothing works, nothing is on time. You have to learn to deal with it.