[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.

When, as we must often do, we fear science, we really fear ourselves. Human dignity is better served by embracing knowledge.

The applause is a celebration not only of the actors but also of the audience. It constitutes a shared moment of delight.

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.

Science exists, moreover, only as a journey toward troth. Stifle dissent and you end that journey.

Nothing is more irredeemably irrelevant than bad science.

At the heart of science lies discovery which involves a change in worldview. Discovery in science is possible only in societies which accord their citizens the freedom to pursue the truth where it may lead and which therefore have respect for different paths to that truth.