Richard Dawkins

... leaders who forbid their followers to use effective contraceptive methods ... express a preference for "natural" methods of population limitation, and a natural method is exactly what they are going to get. It is called starvation.

"However statistically improbable the entity you seek to explain by invoking a designer, the designer himself has got to be at least as improbable. God is the Ultimate Boeing 747" (pg. 138)

They are in you and me; they created us, body and mind; and their preservation is the ultimate rationale for our existence. They have come a long way, those replicators. Now they go by the name of genes, and we are their survival machines.

[If] there is mercy in nature, it is accidental. Nature is neither kind nor cruel but indifferent.

For the first half of geological time our ancestors were bacteria. Most creatures still are bacteria, and each one of our trillions of cells is a colony of bacteria.

It is fashionable to wax apocalyptic about the threat to humanity posed by the AIDS virus, "mad cow" disease, and many others, but I think a case can be made that faith is one of the world's great evils, comparable to the smallpox virus but harder to eradicate.

Mutation is random; natural selection is the very opposite of random.

Group selection theory would therefore predict a tendency to evolve towards an all-dove conspiracy ... But the trouble with conspiracies, even those that are to everybody's advantage in the long run, is that they are open to abuse.

"Imagine you are God. You’re all-powerful, nothing is beyond you. You’re all-loving. So it is really, really important to you that humans are left in no doubt about your existence and your loving nature, and exactly what they need to do in order to get to heaven and avoid eternity in the fires of hell. It’s really important to you to get that across. So what do you do? Well, if you’re Jehovah, apparently this is what you do. You talk in riddles. You tell stories which on the surface have a different message from the one you apparently want us to understand. You expect us to hear X, and instinctively understand that it needs to be interpreted in the light of Y, which you happen to have said in the course of a completely different story 500-1,000 years earlier. Instead of speaking directly into our heads - which God has presumed the capability of doing so - simply, clearly and straightforwardly in terms which the particular individual being addressed will immediately understand and respond to positively - you steep your messages in symbols, in metaphors. In fact, you choose to convey the most important message in the history of creation in code, as if you aspired to be Umberto Eco or Dan Brown. Anyone would think your top priority was to keep generation after generation after generation of theologians in meaningless employment, rather than communicate an urgent life-or-death message to the creatures you love more than any other."

Bush and bin Laden are really on the same side: the side of faith and violence against the side of reason and discussion. Both have implacable faith that they are right and the other is evil. Each believes that when he dies he is going to heaven. Each believes that if he could kill the other, his path to paradise in the next world would be even swifter. The delusional "next world" is welcome to both of them. This world would be a much better place without either of them.

The patient typically finds himself impelled by some deep, inner conviction that something is true, or right, or virtuous: a conviction that doesn't seem to owe anything to evidence or reason, but which, nevertheless, he feels as totally compelling and convincing. We doctors refer to such a belief as "faith".

I'm not clever enough to be a physicist.

What worries me about religion is that it teaches people to be satisfied with not understanding.

If you have a faith, it is statistically overwhelmingly likely that it is the same faith as your parents and grandparents had. No doubt soaring cathedrals, stirring music, moving stories and parables, help a bit. But by far the most important variable determining your religion is the accident of birth. The convictions that you so passionately believe would have been a completely different, and largely contradictory, set of convictions, if only you had happened to be born in a different place. Epidemiology, not evidence.

Evolution is a fact. Beyond reasonable doubt, beyond serious doubt, beyond sane, informed, intelligent doubt, beyond doubt evolution is a fact. The evidence for evolution is at least as strong as the evidence for the Holocaust, even allowing for eye witnesses to the Holocaust. It is the plain truth that we are cousins of chimpanzees, somewhat more distant cousins of monkeys, more distant cousins still of aardvarks and manatees, yet more distant cousins of bananas and turnips... continue the list as long as desired.

If any remedy is tested under controlled scientific conditions and proved to be effective, it will cease to be alternative and will simply become medicine. So-called alternative medicine either hasn’t been tested or it has failed its tests.

The river of my title is a river of DNA, and it flows through time, not space. It is a river of information, not a river of bones and tissues.

The Roman Catholic doctrine of transubstantiation...claims...the "Whole substance" of the wine is converted into the blood of Christ,; the appearance of wine that remains is "merely accidental", "inhering in no substance". Transubstantiation is colloquially taught as meaning that the wine "literally" turns into the blood of Christ. Whether in its obfuscatory Aristotelian or its franker colloquial form, the claim of transubstantiation can be made only if we do serious violence to the normal meanings of words like 'substance' and 'literally'.

Whenever a system of communication evolves, there is always the danger that some will exploit the system for their own ends.

Even sticking to the higher plane of love, is it so very obvious that you can't love more than one person? We seem to manage it with parental love (parents are reproached if they don't at least pretend to love all their children equally), love of books, of food, of wine (love of Chateau Margaux does not preclude love of a fine Hock, and we don't feel unfaithful to the red when we dally with the white), love of composers, poets, holiday beaches, friends . . . why is erotic love the one exception that everybody instantly acknowledges without even thinking about it?