“A clear conscience is the sure sign of a bad memory.”

“The truth is, a person's memory has no more sense that his conscience, and no appreciation whatever of values and proportions.”

“when we badly want a thing, we go to hunting for good and righteous reasons for it; we give it that fine name to comfort our consciences, whereas we privately know we are only hunting for plausible ones.”

“Good friends, good books, and a sleepy conscience: this is the ideal life.”

“A sound heart is a surer guide than an ill-trained conscience.”

“for business reasons, I must preserve the outward signs of sanity.”

“In our country we have those three unspeakably precious things: freedom of speech, freedom of conscience, and the prudence never to practice either.”