Not a single one of your ancestors died young. They all copulated at least once.

Much as we might wish to believe otherwise, universal love and the welfare of the species as a whole are concepts which simply do not make evolutionary sense.

Do not indoctrinate your children. Teach them how to think for themselves, how to evaluate evidence, and how to disagree with you.

Faith is belief without evidence and reason; coincidentally that's also the definition of delusion.

Evolution is just a theory? Well, so is gravity and I don't see you jumping out of buildings.

Such delusions of grandeur to think that a God with a hundred billion galaxies on his mind would give a tuppenny damn who you sleep with, or indeed whether you believe in him.

The less you think, the more you believe.

How thoughtful of God to arrange matters so that, wherever you happen to be born, the local religion always turns out to be the true one.

The universe we observe has precisely the properties we should expect if there is, at bottom, no design, no purpose, no evil, no good, nothing but blind, pitiless indifference.

Science is the poetry of reality.

The theory of evolution by cumulative natural selection is the only theory we know of that is in principle capable of explaining the existence of organized complexity.

We may sit in our library and yet be in all quarters of the earth.

He is intelligent enough to get a job that would earn him good money, but too clever to want one.

It's better to waste money than time. You can always get more money.

The excitement really didn't start to build until the trailer - which was carrying me, with a space suit with ventilation and all that sort of stuff - pulled up to the launch pad.

Don't do something you don't like. Look for a job that makes you excited to get up and go to work everyday.

The destination of the photograph is to reveal what something or somebody looked like, under a particular set of conditions, at a particular moment in time, and to transmit the results to others.

Am I a guy who writes about himself in a comic book, or am I just a character in that book? If I die, will that character keep going, or will he just fade away?

It won't mean you're weak if you turn the other cheek.

We know enough at this moment to say that the God of Abraham is not only unworthy of the immensity of creation; he is unworthy even of man.

It's like boxing a glacier. Enjoy that metaphor, by the way, because your grandchildren will have no idea what a glacier is.