Among the notable things about fire is that it also requires oxygen to burn - exactly like its enemy, life. Thereby are life and flames so often compared.
– Otto Weininger
Every true, eternal problem is an equally true, eternal fault; every answer an atonement, every realisation an improvement.
– Otto Weininger
No men who really think deeply about women retain a high opinion of them; men either despise women or they have never thought seriously about them.
– Otto Weininger
The fixed stars signify the angel in man. That is why man orients himself by them; and that is why women have no appreciation for the starry sky; because they have no sense of the angel in man.