"I was on a cycle rally and we were passing Chequers – I thought, I'll nip in. I'm sorry – I told him. I was very forthright, stupid to be anything else. I said, "Harold, be careful", I said, "Harold, don't rush into this, I beg you." I don't think he got the message. Well, it's very difficult when you're shouting through a letter box!"

"I think that to all living things there is a pleasure in the exercise of their energies, and that even beasts rejoice in being lithe and swift and strong. But a man at work, making something which he …"

"Greek thought was essentially non-algebraic, because it was so concrete. The abstract operations of algebra, which deal with objects that have been purposely stripped of their physical content, could …"

"When adults say, "Teenagers think they are invincible" with that sly, stupid smile on their faces, they don't know how right they are. We need never be hopeless, because we can never be irreparably br…"

"In France at least, the history of science and thought gives pride of place sciences, sciences of the necessary, all close to philosophy: one can observe in their history the almost uninterrupted emer…"