“The demand for certainty is one which is natural to man, but is nevertheless an intellectual vice.”

“With the wise man, what he has does not cease to be enjoyable because some one else has something else. Envy, in fact, is one form of vice, partly moral, partly intellectual, which consists in seeing things never in themselves but only in their relations”

“Collective wisdom, alas, is no adequate substitute for the intelligence of individuals. Individuals who opposed received opinions have been the source of all progress, both moral and intellectual. They have been unpopular, as was natural.”

“For all serious intellectual progress depends upon a certain kind of independence of outside opinion, which cannot exist where the will of the majority is treated with that kind of religious respect which the orthodox give to the will of God.”

“When men assimilate themselves to machines and value only the consequences of their work, not the work itself, style disappears, to be replaced by something which to the mechanised man appears more natural, though in fact is only more brutal.”

“One of the painful things about our time is that those who feel certainty are stupid, and those with any imagination and understanding are filled with doubt and indecision.”

“Dogmatism and skepticism are both, in a sense, absolute philosophies; one is certain of knowing, the other of not knowing. What philosophy should dissipate is certainty, whether of knowledge or ignorance.”