T 2.2.10.5

But here it may reasonably be ask'd, why this mixture takes place only in some cases, and appears not on every occasion. All those objects, which cause love, when plac'd on another person, are the causes of pride, when transfer'd to ourselves; and consequently ought to be causes of humility, as well as love, while they belong to others, and are only compar'd to those, which we ourselves possess. In like manner every quality, which by being directly consider'd, produces hatred, ought always to give rise to pride by comparison, and by a mixture of these passions of hatred and pride ought to excite contempt or scorn. The difficulty then is, why any objects ever cause pure love or hatred, and produce not always the mixt passions of respect and contempt.