“With most men, unbelief in one thing springs from blind belief in another.”

“One might call habit a moral friction: something that prevents the mind from gliding over things but connects it with them and makes it hard for it to free itself from them.”

“Prejudices are so to speak the mechanical instincts of men: through their prejudices they do without any effort many things they would find too difficult to think through to the point of resolving to do them.”

“There is something in our minds like sunshine and the weather, which is not under our control. When I write, the best things come to me from I know not where.”

“...if we gained only one incontestable truth every ten years from each of our philosophical writers the harvest we reaped would be sufficient.”

“The most dangerous of all falsehoods is a slightly distorted truth.”

“Diogenes, filthily attired, paced across the splendid carpets in Plato's dwelling. Thus, said he, do I trample on the pride of Plato. Yes, Plato replied, but only with another kind of pride.”