"A fanatical belief in democracy makes democratic institutions impossible."

"The essence of the Liberal outlook lies not in what opinions are held, but in how they are held: instead of being hel…"

"After ages during which the earth produced harmless trilobites and butterflies, evolution progressed to the point at …"

"Science is what we know, and philosophy is what we don't know."

"The demand for certainty is one which is natural to man, but is nevertheless an intellectual vice. So long as men are…"

"Dogmatism and skepticism are both, in a sense, absolute philosophies; one is certain of knowing, the other of not kno…"

"But so long as men are not trained to withhold judgment in the absence of evidence, they will be led astray by cocksu…"

"Extreme hopes are born of extreme misery, and in such a world hopes could only be irrational."

"In a man whose reasoning powers are good, fallacious arguments are evidence of bias."

"Change is one thing, progress is another. "Change" is scientific, "progress" is ethical; change is indubitable, where…"