Desire arising through pain or pleasure, hatred or love, is greater in proportion as the emotion is greater.
 Baruch Spinoza, Ethics (1677). copy citation

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Author Baruch Spinoza
Source Ethics
Topic pain pleasure
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

“, he will, in so far as he conceives it to be missing, feel pain (III. xix.) . Q.E.D. Note.—This pain, in so far as it has reference to the absence of the object of love, is called Regret. PROP. XXXVII. Desire arising through pain or pleasure, hatred or love, is greater in proportion as the emotion is greater. Proof.—Pain diminishes or constrains a man's power of activity (III. xi. note) , in other words (III. vii.) , diminishes or constrains the effort, wherewith he endeavours to persist in his own being;” source