[In the Universe it may be that] Primitive life is very common and intelligent life is fairly rare. Some would say it has yet to occur on Earth.

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.

The more I read, the more I acquire, the more certain I am that I know nothing.

In the midst of the naysayers, he kept doubting himself and finally gave up. But all he had to do was to surround himself with positive people to be successful.

It is an extra dividend when you like the girl you've fallen in love with.

To be challenged means to strive. I'm almost certain that's true.

I do think this next century, hopefully, will be about a more global view. Where you don't just think, 'Yes, my country is doing well,' but you think about the world at large.

The fact that you can love something that you've lost is all the incentive you need to love again, as opposed to becoming comfortably numb.

To act without knowledge is folly, to know without acting is cowardice.

this one whom habit of memory propels to the ground of his making, sleeper only the mortal sounds can sing awake, this blessing love gives again into our arms.

The genuine priest always feels something higher than compassion.

If all men lead mechanical, unpoetical lives, this is the real nihilism, the real undoing of the world.