My experiences with science led me to God. They challenge science to prove the existence of God. But must we really light a candle to see the sun?

I have learned to use the word 'impossible' with the greatest caution.

Science does not have a moral dimension. It is like a knife. If you give it to a surgeon or a murderer, each will use it differently.

Basic research is what I am doing when I don't know what I am doing.

It was very successful, but it fell on the wrong planet.

The rocket worked perfectly, except for landing on the wrong planet.

It takes sixty-five thousand errors before you are qualified to make a rocket.

The best computer is a man, and it’s the only one that can be mass-produced by unskilled labor.

Don't tell me that man doesn't belong out there. Man belongs wherever he wants to go - and he'll do plenty well when he gets there.

I believe in an immortal soul. Science has proved that nothing disintegrates into nothingness. Life and soul, therefore, cannot disintegrate into nothingness, and so are immortal.

Conquering the universe one has to solve two problems: gravity and red tape. We could have mastered gravity.

I learnt years ago not to use logic to understand African politics.

Success is one of the worst enemies of success, because success tends to breed complacency and lack of humility.

Actors pull from their own experiences to bring reality to the characters. I wouldn't want to play someone who's a lot like me. There would be no turning it on or off.

If you become so intensely curious that without knowing you cannot live, that is called seeking.

The 'Tonight Show' didn't seem like an actual job that you could have. All you remember is you watched Johnny Carson, and you never thought he would retire.

Happiness is like a cake: have too much of it and you get sick of it.

I don’t want to make the same mistakes I’ve made before. I want to be free. I want to be with you. We will be together. I believe I will have less to live for, if I am not with you.

Wherever arms flow, violence follows. Bullets replace ballots as the solution to political disputes.

The problem isn’t too little money in political campaigns, but not enough.