Nothing is more evident, than that any person acquires our kindness, or is exposed to our ill-will, in proportion to the pleasure or uneasiness we receive from him, and that the passions keep pace exactly with the sensations in all their changes and variations.
 David Hume, A Treatise of Human Nature (1738). copy citation

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

Context

“I shall, therefore, employ the sequel of this part, First, In removing some difficulties, concerning particular causes of these passions. Secondly, In examining the compound affections, which arise from the mixture of love and hatred with other emotions. Nothing is more evident, than that any person acquires our kindness, or is exposed to our ill-will, in proportion to the pleasure or uneasiness we receive from him, and that the passions keep pace exactly with the sensations in all their changes and variations. Whoever can find the means either by his services, his beauty, or his flattery, to render himself useful or agreeable to us, is sure of our affections: As on the other hand, whoever harms or displeases us never fails to excite our anger or hatred.” source