In that case resemblance converts the idea into an impression, not only by means of the relation, and by transfusing the original vivacity into the related idea; but also by presenting such materials as take fire from the least spark.

And as in both cases a love or affection arises from the resemblance, we may learn that a sympathy with others is agreeable only by giving an emotion to the spirits, since an easy sympathy and correspondent emotions are alone common to RELATION, ACQUAINTANCE, and RESEMBLANCE.
The great propensity men have to pride may be considered as another similar phaenomenon.

It often happens, that after we have lived a considerable time in any city; however at first it might be disagreeable to us; yet as we become familiar with the objects, and contact an acquaintance, though merely with the streets and buildings, the aversion diminishes by degrees, and at last changes into the opposite passion.
The mind finds a satisfaction and ease in the view of objects, to which it is accustomed, and naturally prefers them to others, which, though, perhaps, in themselves more valuable, are less known to it.

By the same quality of the mind we are seduced into a good opinion of ourselves, and of all objects, that belong to us.

They appear in a stronger light; are more agreeable; and consequently fitter subjects of pride and vanity, than any other.
It may not be amiss, in treating of the affection we bear our acquaintance and relations, to observe some pretty curious phaenomena, which attend it.