When you teach a child something you take away forever his chance of discovering it for himself.

I could not think without writing.

True interest appears when the self identifies itself with ideas or objects, when it finds in them a means of expression and they become a necessary form of fuel for its activity.

Children require long, uniterrupted periods of play and exploration

Only education is capable of saving our societies from possible collapse, whether violent, or gradual.

Logic and mathematics are nothing but specialised linguistic structures.

It was while teaching philosophy that I saw how easily one can say ... what one wants to say. ... In fact, I became particularly aware if the dangers of speculation ... It's so much easier than digging out the facts. You sit in your office and build a system. But with my training in biology, I felt this kind of undertaking precarious.