In so far as men are assailed by emotions which are passions, they can be contrary one to another.
 Baruch Spinoza, Ethics (1677). copy citation

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Author Baruch Spinoza
Source Ethics
Topic passion emotions
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

“(III. li.) , and to this extent differ in nature; lastly, that one and the same man may be differently affected towards the same object, and may therefore be variable and inconstant. Q.E.D. PROP. XXXIV. In so far as men are assailed by emotions which are passions, they can be contrary one to another. Proof.—A man, for instance Peter, can be the cause of Paul's feeling pain, because he (Peter) possesses something similar to that which Paul hates (III. xvi.) , or because Peter has sole possession of a thing which Paul also loves” source