If you look up at the Milky Way through the eyes of Carl Sagan, you get a feeling in your chest of something greater than yourself. And it is. But it's not supernatural.

We admit that we are like apes, but we seldom realise that we are apes. Our common ancestor with the chimpanzees and gorillas is much more recent than their common ancestor with the Asian apes - the gibbons and orangutans. There is no natural category that includes chimpanzees, gorillas and orangutans but excludes humans.

Far from being demeaning to human spiritual values, scientific rationalism is the crowning glory of the human spirit. Of course you can use the products of science to do bad things, but you can use them to do good things too.

An atheist is just somebody who feels about Yahweh the way any decent Christian feels about Thor or Baal or the golden calf. We are all atheists about most of the gods that humanity has ever believed in. Some of us just go one god further.

There is a popular cliché ... which says that you cannot get out of computers any more than you have put in..., that computers can only do exactly what you tell them to, and that therefore computers are never creative. This cliché is true only in a crashingly trivial sense, the same sense in which Shakespeare never wrote anything except what his first schoolteacher taught him to write-words.

Granted, we may try to help our own family members because they share our DNA. Or help someone else in expectation that they will help us later. But when you look at what we admire as the most generous manifestations of altruism, they are not based on kin selection or reciprocity. An extreme example might be Oskar Schindler risking his life to save more than a thousand Jews from the gas chambers. That's the opposite of saving his genes.

Being dead will be no different from being unborn -- I shall be just as I was in the time of William the Conqueror or the dinosaurs or the trilobites. There is nothing to fear in that.