The study of history is useful to the historian by teaching him his ignorance of women.

My rule in making up examination questions is to ask questions which I can't myself answer. It astounds me to see how some of my students answer questions which would play the deuce with me.

Some day science may have the existence of mankind in its power, and the human race commit suicide, by blowing up the world.

The proper study of mankind is woman.

His brothers were the type; he was the variation.

I firmly believe, that before many centuries more, science will be the master of man. The engines he will have invented will be beyond his strength to control. Someday, science shall have the existence of mankind in its power, and the human race commit suicide by blowing up the world.

Average human nature is very coarse, and its ideals must necessarily be average. The world never loved perfect poise. What the world does love is commonly absence of poise, for it has to be amused.