In order to depict a man one must understand him, and to understand him one must be like him; in order to portray his psychological activities one mu… - Otto Weininger

To understand a man is really to be that man.

Man is alone in the world, in tremendous eternal isolation. He has no object outside himself; lives for nothing else; he is far removed from being the slave of his wishes, of his abilities, of his necessities; he stands far above social ethics; he is alone. Thus he becomes one and all.

There are men who are willing to marry a woman they do not care about merely because she is admired by other men. Such a relation exists between many men and their thoughts.

A creature that cannot grasp the mutual exclusiveness of A and not A has no difficulty in lying; more than that, such a creature has not even any consciousness of lying, being without a standard of truth.