Man even when he is selfish or evil always follows principles, woman never follows anything but impulses.
 Leopold von Sacher-Masoch, Venus in Furs (1870). copy citation

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Author Leopold von Sacher-Masoch
Source Venus in Furs
Topic evil women
Date 1870
Language English
Reference
Note Translated by Fernanada Savage
Weblink https://en.wikisource.org/wiki/Venus_in_Furs

Context

“She has the nature of a savage, who is faithful or faithless, magnanimous or cruel, according to the impulse that dominates at the moment. Throughout history it has always been a serious deep culture which has produced moral character. Man even when he is selfish or evil always follows principles, woman never follows anything but impulses. Don't ever forget that, and never feel secure with the woman you love." * * * * * Her friend has left. At last an evening alone with her again. It seems as if Wanda had saved up all the love, which had been kept from her, for this superlative evening;” source