This is not only easily conceived, but I will venture to affirm it is the only manner, in which we can conceive this subject.

An easy transition of ideas, which, of itself, causes no emotion, can never be necessary, or even useful to the passions, but by forwarding the transition betwixt some related impressions.

Not to mention, that the same object causes a greater or smaller degree of pride, not only in proportion to the encrease or decrease of its qualities, but also to the distance or nearness of the relation; which is a clear argument for the transition of affections along the relation of ideas; since every change in the relation produces a proportionable change in the passion.

Thus one part of the preceding system, concerning the relations of ideas is a sufficient proof of the other, concerning that of impressions; and is itself so evidently founded on experience, that it would be lost time to endeavour farther to prove it.
This will appear still more evidently in particular instances.

Men are vain of the beauty of their country, of their county, of their parish.
Here the idea of beauty plainly produces a pleasure.