Mathematicians practice absolute freedom.

Every man should have a fair-sized cemetary in which to bury the faults of his friends.

Power is poison. Its effect on Presidents had always been tragic, chiefly as an almost insane excitement at first, and a worse reaction afterwards.

At the utmost, the active-minded young man should ask of his teacher only mastery of his tools. The young man himself, the subject of education, is a certain form of energy; the object to be gained is economy of his force; the training is partly the clearing away of obstacles, partly the direct application of effort. Once acquired, the tools and models may be thrown away.

The woman who is known only through a man is known wrong.

I am not prepared to deny or assert any proposition which concerns myself; but certainly this solitary struggle with platitudinous atoms, called men and women by courtesy, leads me to wish for my wife again. How did I ever hit on the only woman in the world who fits my cravings and never sounds hollow anywhere? Social chemistry-the mutual attraction of equivalent human molecules-is a science yet to be created, for the fact is my daily study and only satisfaction in life.

Since [Rousseau's] time, and largely thanks to him, the Ego has steadily tended to efface itself, and, for purposes of model, to become a manikin on which the toilet of education is to be draped in order to show the fit or misfit of the clothes. The object of study is the garment, not the figure.