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

Authority in science exists to be questioned, since heresy is the spring from which new ideas flow.

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

Reality is no less precious if it presents itself to someone else. All are discoverers, and if we disenfranchise any, all suffer.

For science must breathe the oxygen of freedom.

[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.

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