The reason, why pride is so much more delicate in this particular than joy, I take to be, as follows. In order to excite pride, there are always two objects we must contemplate, viz. the cause or that object which produces pleasure; and self, which is the real object of the passion.
 David Hume, A Treatise of Human Nature (1738). copy citation

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

Context

“We are rejoiced for many goods, which, on account of their frequency, give us no pride. Health, when it returns after a long absence, affords us a very sensible satisfaction; but is seldom regarded as a subject of vanity, because it is shared with such vast numbers.
The reason, why pride is so much more delicate in this particular than joy, I take to be, as follows. In order to excite pride, there are always two objects we must contemplate, viz. the cause or that object which produces pleasure; and self, which is the real object of the passion. But joy has only one object necessary to its production, viz. that which gives pleasure; and though it be requisite, that this bear some relation to self, yet that is only requisite in order to render it agreeable; nor is self, properly speaking, the object of this passion.” source