“Behavior is what a man does, not what he thinks, feels, or believes.”

“It is necessary to the happiness of man that he be mentally faithful to himself. Infidelity does not consist in believing, or in disbelieving, it consists in professing to believe what he does not believe.”

“At the beginning of human history, man lost some of the basic animal instincts in which an animal's behavior is embedded and by which it is secured. Such security, like paradise, is closed to man forever; man has to make choices. In addition to this, however, man has suffered another loss in his more recent development inasmuch as the traditions which buttressed his behavior are now rapidly diminishing. No instinct tells him what he has to do, and no tradition tells him what he ought to do; sometimes he does not even know what he wishes to do. Instead, he either wishes to do what other people do (conformism) or he does what other people tell him to do (totalitarianism).”

“One of man's greatest flaws is that he thinks far too highly of what he does.”

“what is a german? to say a man is a german, what is that? does it tell you if he is a good man? or a bad man? no, my friend, it tells you nothing about a man to say he is german. a man must think what he is inside. what he is on the outside, how can this matter?”

“A man does what he can; a woman does what a man cannot.”