It is time to stop the mealy-mouthed euphemisms: 'Nationalists', 'Loyalists', 'Communities', 'Ethnic Groups', 'Cultures', 'Civilizations'. Religions is the word you need. Religions is the word you are struggling hypocritially to avoid.

If there is something that appears to lie beyond the natural world as it is now imperfectly understood, we hope to eventually understand it and embrace it within the natural. As ever when we unweave a rainbow, it will not become less wonderful.

Good and evil - I don't believe that there is hanging out there, anywhere, something called good and something called evil.

As long as we accept the principle that religious faith must be respected simply because it is religious faith, it is hard to withhold respect from the faith of Osama bin Laden and the suicide bombers

As my colleague, the physical chemist Peter Atkins, puts it, we must be equally agnostic about the theory that there is a teapot in orbrit around the planet Pluto. We can't disprove it. But that doesn't mean the theory that there is a teapot is on level terms with the theory that there isn't.

There is an anaesthetic of familiarity, a sedative of ordinariness which dulls the senses and hides the wonder of existence. For those of us not gifted in poetry, it is at least worth while from time to time making an effort to shake off the anaesthetic. What is the best way of countering the sluggish habitutation brought about by our gradual crawl from babyhood? We can't actually fly to another planet. But we can recapture that sense of having just tumbled out to life on a new world by looking at our own world in unfamiliar ways.

It's very important to try to inculcate into children moral rules, such as "do as you would be done by."