Scientia is knowledge. It is only in the popular mind that it is equated with facts.

The eye searches for shapes. It searches for a beginning, a middle, and an end.

If we treasure our own experience and regard it as real, we must also treasure other people's experience.

Individual scientists like myself - and many more conspicuous - pointed to the dangers of radioactive fallout over Canada if we were to launch nuclear weapons to intercept incoming bombers.

Nothing is more irredeemably irrelevant than bad science.

Discoveries that are anticipated are seldom the most valuable. ... It's the scientist free to pilot his vessel across hidden shoals into open seas who gives the best value.

[Intellectual courage is] the quality that allows one to believe in one's judgement in the face of disappointment and widespread skepticism. Intellectual courage is even rarer than physical courage.