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

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.

It takes a trained and discerning researcher to keep the goal in sight, and to detect evidence of the creeping progress toward it.

Even in the world of molecules the civilising influence of modest restraints is a cause for rejoicing.

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

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.

Science is an enterprise that can only flourish if it puts the truth ahead of nationality, ethnicity, class and color.