For science must breathe the oxygen of freedom.

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

Idealism is the highest form of reason.

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

[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.

Young people ask me if this country is serious about science. They aren't thinking about the passport that they will hold, but the country that they must rely on for support and encouragement.

It is folly to use as one's guide in the selection of fundamental science the criterion of utility. Not because (scientists)... despise utility. But because. .. useful outcomes are best identified after the making of discoveries, rather than before.