Some dreamers demand that scientists only discover things that can be used for good.

In education the appetite does indeed grow with eating. I have never known anyone to abandon study because they knew too much.

A wise man in China asked his gardener to plant a shrub. The gardener objected that it only flowered once in a hundred years. "In that case," said the wise man, "plant it immediately." [On the importance of fundamental research.]

[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.

Science never gives up searching for truth, since it never claims to have achieved it.

In nation after nation, democracy has taken the place of autocracy.

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.