“Swiftness is the enemy of comprehension.”

“It is not the reverence for words, but for their meaning that determines our deepness of comprehension of a given assertion about Nature.”

“... One can know very much but comprehend very little and, besides, ... different objectives require different levels of knowledge - though always with the maximum possible comprehension suited to the purpose.”

“Teaching the layperson (divulgare) is not distorting (tergiversare) the subject, but educating the public; and it is our duty as scientists to educate without distorting the essence of the scientific knowledge attained by humanity. The future of our society depends upon this premise.”

“The command of our language is crucial to focusing our thoughts and communicating them with precision to others.”

“Without causality in the world, there is no point in educating people, or making any moral or political appeal.”

“Why is it so difficult for us to think in relative terms? Well, for the good reason that human nature loves absoluteness, and erroneously considers it as a state of higher knowledge.”