"The brain is a machine that makes theories."

"The ultimate aim of the modern movement in biology is in fact to explain all biology in terms of physics and chemistry."

"The view of ourselves as 'persons' is just as erroneous as the view that the sun goes round the earth."

"The greatest joy in science is to understand something that no one else has understood before."

"If you want to be a scientist, you have to be prepared to be wrong a lot."