“I know some who are constantly drunk on books as other men are drunk on whiskey.”

“There are some people who read too much: the bibliobibuli. I know some who are constantly drunk on books, as other men are drunk on whiskey or religion. They wander through this most diverting and stimulating of worlds in a haze, seeing nothing and hearing nothing.”

“Moral certainty is always a sign of cultural inferiority. The more uncivilized the man, the surer he is that he knows precisely what is right and what is wrong. All human progress, even in morals, has been the work of men who have doubted the current moral values, not of men who have whooped them up and tried to enforce them. The truly civilized man is always skeptical and tolerant, in this field as in all others. His culture is based on "I am not too sure.”

“The men the American people admire most extravagantly are the most daring liars; the men they detest most violently are those who try to tell them the truth.”

“I am wholly devoid of public spirit or moral purpose. This is incomprehensible to many men, and they seek to remedy the defect by crediting me with purposes of their own. The only thing I respect is intellectual honesty, of which, of course, intellectual courage is a necessary part. A Socialist who goes to jail for his opinions seems to me a much finer man than the judge who sends him there, though I disagree with all the ideas of the Socialist and agree with some of those of the judge. But though he is fine, the Socialist is nevertheless foolish, for he suffers for what is untrue. If I knew what was true, I'd probably be willing to sweat and strive for it, and maybe even to die for it to the tune of bugle-blasts. But so far I have not found it.”

“There is in writing the constant joy of sudden discovery, of happy accident.”

“The best teacher is not the one who knows most but the one who is most capable of reducing knowledge to that simple compound of the obvious and wonderful.”