Some people find clarity threatening. They like muddle, confusion, obscurity. So when somebody does no more than speak clearly it sounds threatening.

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.

Тhere isnʹt much I wouldnʹt do for you. Тhe stupider, the better.

How much suffering did you lay on yourself before you awakened and recognized that guilt is deadly, and empty, and profitless?

Letting yesterday affect today will only destroy the excitement of tomorrow.

It's so much easier to pray for a bore than to go and see one.

Whatever your personal political feelings are, if you become involved in them publicly you're bound to come out the loser.

Work is always an antidote to depression.

Poor John Simon - what a nightmare, to wake up in the morning and realize that you are John Simon.

A strategy that doesn't take into account resources is doomed to failure.

Everything that is hard to attain is easily assailed by the generality of men.

Getting older is tough. I remember the last time I felt an erection. It was at the movies. The only trouble is, it belonged to the guy sitting next to me.