If a man conceives, that anyone similar to himself hates anything also similar to himself, which he loves, he will hate that person.
 Baruch Spinoza, Ethics (1677). copy citation

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Author Baruch Spinoza
Source Ethics
Topic love hate
Date 1677
Language English
Reference
Note Translated by R. H. M. Elwes
Weblink http://www.gutenberg.org/files/3800/3800-h/3800-h.htm

Context

“For the strength of love is in proportion to the strength of the hatred, wherefore the man would desire, that the hatred be continually increased more and more, and, for a similar reason, he would desire to become more and more ill, in order that he might take a greater pleasure in being restored to health: in such a case he would always endeavour to be ill, which (III. vi.) is absurd. PROP. XLV. If a man conceives, that anyone similar to himself hates anything also similar to himself, which he loves, he will hate that person. Proof.—The beloved object feels reciprocal hatred towards him who hates it (III. xl.) ; therefore the lover, in conceiving that anyone hates the beloved object, conceives the beloved thing as affected by hatred, in other words” source