Dissent is the mark of freedom.

There must be something unique about man because otherwise, evidently, the ducks would be lecturing about Konrad Lorenz, and the rats would be writing papers about B. F. Skinner.

The symbol and the metaphor are as necessary to science as to poetry.

Dissent is the mark of freedom.

To me, being an intellectual doesn't mean knowing about intellectual issues; it means taking pleasure in them.

To me the most interesting thing about man is that he is an animal who practices art and science and in every known society practices both together.

Knowledge is an unending adventure at the edge of uncertainty.