“Certitude leads to violence. This is a proposition that has an easy application and a difficult one. The easy application is to ideoologues, dogmatists, and bullies--people who think that their rigtness justifies them in imposing on anyone who does not happen to suscribe to their particular ideology, dogma or notion of turf. If the conviction of rightness is powerful enough, resistance to it will be met, sooner or later by force. There are people like this in every sphere of life, and it is natural to feel that the world would be a better place without them!”

“Trouble makes us one with every human being in the world - and unless we touch others, we're out of touch with life.”

“It is better for all the world, if instead of waiting to execute degenerate offspring for crime or to let them starve for their imbecility, society can prevent those who are manifestly unfit from continuing their kind. The principle that sustains compulsory vaccination is broad enough to cover cutting the fallopian tubes. Three generations of imbeciles are enough.”

“We believed that it was most desirable that the North should win, we believed in the principle that the Union is indissoluable, we, or many of us at least, also believed that the conflict was inevitable, and that slavery had lasted long enough. But we equally believed that those who stood against us held just as sacred conviction that were the opposite of ours, and we respected them as every men with a heart must respect those who give all for their belief.”

“When men have realized that time has upset many fighting faiths, they may come to believe... that the ultimate good desired is better reached by free trade in ideas-- that the best test of truth is the power of the thought to get itself accepted in the competition of the market, and that truth is the only ground upon which their wishes safely can be carried out. That at any rate is the theory of our Constitution. It is an experiment. As all life is an experiment. Every year if not every day we wager our salvation upon some prophecy based upon imperfect knowledge. ”

“It is a good plan to have a book with you in all places and at all times. If you are presently without, hurry without delay to the nearest shop and buy one of mine.”

“What refuge is there for the victim who is oppressed with the feeling that there are a thousand new books he ought to read, while life is only long enough for him to attempt to read a hundred?”