I am very hostile to religion because it is enormously dominant, especially in American life. And I don't buy the argument that, well, it's harmless. I think it is harmful, partly because I care passionately about what's true.

Scientists can have their judgment clouded by their professional aspirations. And the pure truth of faith, which you can think of as this clear spiritual water, is poured into rusty vessels called human beings, and so sometimes the benevolent principles of faith can get distorted as positions are hardened.

I do not believe there is an atheist in the world who would bulldoze Mecca-or Chartres, York Minster or Notre Dame, the Shwe Dagon, the temples of Kyoto or, of course, the Buddhas of Bamiyan.

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

People really, really hate their religion being criticized. It's as though you've said they had an ugly face; they seem to identify personally with it.

Next time that somebody tells you something is true, why not say to them: 'What kind of evidence is there for that?' And if they can't give you a good answer, I hope you'll think very carefully before you believe a word they say.

It is raining DNA outside. On the bank of the Oxford canal at the bottom of my garden is a large willow tree, and it is pumping downy seeds into the air. ... spreading DNA whose coded characters spell out specific instructions for building willow trees that will shed a new generation of downy seeds. ... It is raining instructions out there; it's raining programs; it's raining tree-growing, fluff-spreading, algorithms. That is not a metaphor, it is the plain truth. It couldn't be any plainer if it were raining floppy discs.