Don't be disabled in spirit as well as physically.

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.

You don't get harmony when everyone sings the same note.

You can't buy enlightenment, but you can hire a mirror so you can watch it happen.

My core goal is to dismantle, defeat, destroy al Qaeda and its allies that killed Americans and are still plotting to go kill Americans.

Wealth can also be that attitude of gratitude with which we remind ourselves everyday to count our blessings.

Try again. Fall flat on your face, get up, try again. Fall on your face, get up, try again.

One of the interesting initiatives we've taken in Washington, D.C., is we've got these vampire-busting devices. A vampire is a-a cell deal you can plug in the wall to charge your cell phone.

I decided to play tennis not because I wanted to be a professional player, but because my parents wanted me to get involved in something so I wouldnt be running around the streets in Serbia.

It will take mind and memory months and possibly years to gather together the details, and thus learn and know the whole extent of the loss.

I feel healthy! I feel happy! I feel terrific!

A grudge is like being stung to death by one bee.