For as pity is an uneasiness, and malice a joy, arising from the misery of others, pity should naturally, as in all other cases, produce hatred; and malice, love.
 David Hume, A Treatise of Human Nature (1738). copy citation

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Author David Hume
Source A Treatise of Human Nature
Topic misery joy
Date 1738
Language English
Reference
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Weblink http://www.gutenberg.org/files/4705/4705-h/4705-h.htm

Context

“Other passions are afterwards confounded with them. There is always a mixture of love or tenderness with pity, and of hatred or anger with malice. But it must be confessed, that this mixture seems at first sight to be contradictory to my system. For as pity is an uneasiness, and malice a joy, arising from the misery of others, pity should naturally, as in all other cases, produce hatred; and malice, love. This contradiction I endeavour to reconcile, after the following manner.
In order to cause a transition of passions, there is required a double relation of impressions and ideas, nor is one relation sufficient to produce this effect.” source