On the contrary, when we compare the sentiments of others to our own, we feel a sensation directly opposite to the original one, viz. a joy from the grief of others, and a grief from their joy.
 David Hume, A Treatise of Human Nature (1738). copy citation

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

Context

“Both these affections arise from the imagination, according to the light, in which it places its object. When our fancy considers directly the sentiments of others, and enters deep into them, it makes us sensible of all the passions it surveys, but in a particular manner of grief or sorrow. On the contrary, when we compare the sentiments of others to our own, we feel a sensation directly opposite to the original one, viz. a joy from the grief of others, and a grief from their joy. But these are only the first foundations of the affections of pity and malice. 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.” source