"The only question which any wise man can ask himself, and which any honest man will ask himself, is whether a doctrine is true or false"
"The child who has been taught to make an accurate elevation, plan, and section of a pint pot has had an admirable training in accuracy of eye and hand"
"The only freedom I care about is the freedom to do right; the freedom to do wrong I am ready to part with on the cheapest terms to anyone who will take it of me"
"No slavery can be abolished without a double emancipation, and the master will benefit by freedom more than the freed-man"
"The great tragedy of science - the slaying of a beautiful hypothesis by an ugly fact"
"Science commits suicide when it adopts a creed"
"Patience and tenacity are worth more than twice their weight of cleverness"
"Try to learn something about everything and everything about something"
"The great thing in the world is not so much to seek happiness as to earn peace and self-respect"
"The improver of natural knowledge absolutely refuses to acknowledge authority, as such. For him, skepticism is the highest of duties; blind faith the one unpardonable sin"
"Science is organized common sense where many a beautiful theory was killed by an ugly fact"
"There is the greatest practical benefit in making a few failures early in life"
"Ecclesiasticism in science is only unfaithfulness to truth"
"Books are the money of Literature, but only the counters of Science"
"All truth, in the long run, is only common sense clarified"
