I can remember at the age of about six being fascinated by the planets and learning all about Mars and Venus and things.

The rule of thumb based into the brain by natural selection would not have been, Be nice to your kin and be nice to potential reciprocators. It would have been, Be nice to everybody, because everybody would have been included.

The physicist's problem is the problem of ultimate origins and ultimate natural laws. The biologist's problem is the problem of complexity.

I personally would go further and say that, if your morality is based, as mine is, on a desire to increase the sum of happiness and reduce suffering, the decision to deliberately give birth to a Down baby, when you have the choice to abort it early in the pregnancy, might actually be immoral from the point of view of the child’s own welfare.

I think by the age of about nine I recognized that there were a lot of different religions, and it was an accident I happened to be born into one of them. If I had been born somewhere else, I would have had a different one. Which is a pretty good lesson, actually. Everyone should learn that.

You can't understand European history at all other than through religion, or English literature either if you can't recognise biblical allusions.

It really comes down to parsimony, economy of explanation. It is possible that your car engine is driven by psychokinetic energy, but if it looks like a petrol engine, smells like a petrol engine and performs exactly as well as a petrol engine, the sensible working hypothesis is that it is a petrol engine.