I hate doubt, yet I am certain that doubt is the only way to approach anything worth believing in.

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.

What is your original face, before your mother and father were born?

In the big scheme of things, a little love is all we need

Those who look for the laws of Nature as a support for their new works collaborate with the creator.

The urge to kill, like the urge to beget, Is blind and sinister. Its craving is set Today on the flesh of a hare: tomorrow it can Howl the same way for the flesh of a man.

I have no problem spending money on a great meal with friends or a flight to see somebody that I love, versus something like a fancy car. I don't need a fancy car. I don't need a giant TV.

Our mothers give us so many gifts. They give us the precious gift of life, of course, but they also leave treasured lessons that can guide us along our journeys even when they are no longer with us.

The first flower that blossomed on this earth was an invitation to an unborn song.

And I love doing my own projects; that's what I've always wanted to do.

Love is like a flower, even the most beautiful kind dies.

Nothing will sustain you more potently than the power to recognize in your humdrum routine, as perhaps it may be thought, the true poetry of life.