The important thing is to be able to understand anyone who has something useful to say. - There is a general moral here. Be very careful and very clear about what you say. But do not be dogmatic about your own language. Be prepared to express any careful thought in the language your audience will understand. And be prepared to learn from someone who talks a language with which you are not familiar.

If you were just intent on killing people you could do better with a bomb made of agricultural fertiliser.

The final arbitrator in philosophy is not how we think but what we do.

Molecular biology has routinely taken problematic things under its wing without altering core ideas.

I have this extraordinary curiosity about all subjects of the natural and human world and the interaction between the physical sciences and the social sciences.

Every once in a while, something happens to you that makes you realise that the human race is not quite as bad as it so often seems to be.

Why should there be the method of science? There is not just one way to build a house, or even to grow tomatoes. We should not expect something as motley as the growth of knowledge to be strapped to one methodology.