[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.

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

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

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

[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.

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.

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