If the foundation of marriage depends on equality and agreement, it is likewise true that the greatest passions rise out of opposites.
 Leopold von Sacher-Masoch, Venus in Furs (1870). copy citation

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

Context

“You were imprudent enough to leave the choice to me. Therefore I choose; I want you to be my slave, I shall make a plaything for myself out of you!" "Oh, please do," I cried half-shuddering, half-enraptured. "If the foundation of marriage depends on equality and agreement, it is likewise true that the greatest passions rise out of opposites. We are such opposites, almost enemies. That is why my love is part hate, part fear. In such a relation only one can be hammer and the other anvil. I wish to be the anvil. I cannot be happy when I look down upon the woman I love.” source