... not one living species will transmit its unaltered likeness to a distant futurity.

The love for all living creatures is the most noble attribute of man.

A man who dares to waste one hour of time has not discovered the value of life.

The world will not be inherited by the strongest, it will be inherited by those most able to change.

Nothing exists for itself alone, but only in relation to other forms of life

Building a better mousetrap merely results in smarter mice.

A mathematician is a blind man in a dark room looking for a black cat which isn't there.

An American monkey, after getting drunk on brandy, would never touch it again, and thus is much wiser than most men.

It is not the biggest, the brightest or the best that will survive, but those who adapt the quickest.

We can allow satellites, planets, suns, universe, nay whole systems of universes, to be governed by laws, but the smallest insect, we wish to be created at once by special act.

What a book a devil's chaplain might write on the clumsy, wasteful, blundering, low, and horribly cruel work of nature!

When you really love someone, you see all their mess and their brokenness and you love them anyway. In fact, seeing all of that sort of makes you love them more.

I have no time to look back. My heart is dancing in the present moment feeling the joy of life.

There are those who work so they can stop. Stopping is the why of work.There are those who stop so they can work.Working is the why of work.

The dead of midnight is the noon of thought.

It is the duty of the long-term investor to endure great losses with equanimity.

What happened in the Western world was that Plato ceased to be the way people thought. Aristotle was rediscovered, and the modern, educated world moved toward Aristotelian thinking.

When life knocks you down, try to land on your back. Because if you can look up, you can get up. Let your reason get you back up.

Even a bad man is better than a good book.

The truth is not what we received today. Once again, we are being used as props in a Pentagon public relations exercise.

Men have an easier time buying bathing suits. Women have two types: depressing and more depressing. Men have two types: nerdy and not nerdy.