I am guilty of the great crime of optimism.

The science of today is the technology of tomorrow.

Secrecy in science does not work. Withholding information does more damage to us than to our competitors.

There's no system foolproof enough to defeat a sufficiently great fool.

I believe in evil. It is the property of all those who are certain of truth. Despair and fanaticism are only differing manifestations of evil.

The extinction of the human race will come from its inability to EMOTIONALLY comprehend the exponential function.

Science attempts to find logic and simplicity in nature. Mathematics attempts to establish order and simplicity in human thought.

No endeavor that is worthwhile is simple in prospect; if it is right, it will be simple in retrospect.

We must learn to live with contradictions, because they lead to deeper and more effective understanding.

Had we not pursued the hydrogen bomb, there is a very real threat that we would now all be speaking Russian. I have no regrets.

I think that intellectuals who end up in hell will have to read page proofs and check indexes there.

The Sun would have wasted its life but for the evolution of life on earth. The one who gives should be grateful to the one who receives.

Always acknowledge your daily blessings with a grateful heart, but never dare to be content with them. Your true potential in life is limitless.

The trick is growing up without growing old.

A caged canary is secure; but it is not free. It is easier for free men to resist terrorism from afar than tyranny from within.

I'm familiar with that feeling of silence that comes with a very imminent catastrophe, when you know you have absolutely no control over a situation.

He in his madness prays for storms, and dreams that storms will bring him peace.

It's not for everyone. Some people just haven't got it. Maybe he [Boris Johnson] is one of them.

I really hope my peers appreciate and respect what I'm doing.

I pretty much stay true to myself and try to find the good in people and not be snarky.

You can't get hurt skiing, unless you fall