“The ultimate authority must always rest with the individual's own reason and critical analysis.”

“One must require from each one the duty which each one can perform. Accepted authority rests first of all on reason.”

“If you find from your own experience that something is a fact and it contradicts what some authority has written down, then you must abandon the authority and base your reasoning on your own findings.”

“In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.”

“In the last analysis, the essential thing is the life of individual. This alone makes history, here alone do the great transformations take place, and the whole future, the whole history of the world, ultimately springs as a gigantic summation from these hidden source in individuals.”

“In the sciences, the authority of thousands of opinions is not worth as much as one tiny spark of reason in an individual man.”