Our great democracies still tend to think that a stupid man is more likely to be honest than a clever man.

It is possible that mankind is on the threshold of a golden age; but, if so,it will be necessary first to slay the dragon that gaurds the door,and this dragon is religion.

Many a man will have the courage to die gallantly, but will not have the courage to say, or even to think, that the cause for which he is asked to die is an unworthy one.

Mathematics rightly viewed posses not only truth but supreme beauty - a beauty cold and austere like that of sculpture.

A process which led from the amoeba to man appeared to the philosophers to be obviously a progress though whether the amoeba would agree with this opinion is not known.

If wars are eliminated and production is organized scientifically, it is probable that four hours' work a day will suffice to keep everybody in comfort.

The psychology of adultery has been falsified by conventional morals, which assume, in monogamous countries, that attraction to one person cannot coexist with affection for another. Everybody knows that this is untrue.