It is possible in medicine, even when you intend to do good, to do harm instead. That is why science thrives on actively encouraging criticism rather than stifling it.

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

Alister McGrath has now written two books with my name in the title. The poet W. B. Yeats, when asked to say something about bad poets who made a living by parasitizing him, wrote the splendid line, 'was there ever dog that praised his fleas?

I respect you too much to respect your ridiculous ideas.

'Take offense at the drop of a hat' is the unwritten eleventh commandment.

It is all too easy to mistake passion that can change its mind for fundamentalism, which never will.

Be warned that if you wish, as I do, to build a society in which individuals cooperate generously and unselfishly towards a common good, you can expect little help from biological nature. Let us try to teach generosity and altruism, because we are born selfish.