The passions of pride and humility, as well as those of love and hatred, are connected together by the identity of their object, which to the first set of passions is self, to the second some other person. These two lines of communication or connexion form two opposite sides of the square.
 David Hume, A Treatise of Human Nature (1738). copy citation

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

Context

“Regard now with attention the nature of these passions, and their situation with respect to each other. It is evident here are four affections, placed, as it were, in a square or regular connexion with, and distance from each other. The passions of pride and humility, as well as those of love and hatred, are connected together by the identity of their object, which to the first set of passions is self, to the second some other person. These two lines of communication or connexion form two opposite sides of the square. Again, pride and love are agreeable passions; hatred and humility uneasy. This similitude of sensation betwixt pride and love, and that betwixt humility and hatred form a new connexion, and may be considered as the other two sides of the square.” source