From this reasoning, as well as from undoubted experience, we may conclude, that an association of ideas, however necessary, is not alone sufficient to give rise to any passion.
It is evident, then, that when the mind feels the passion either of pride or humility upon the appearance of related object, there is, beside the relation or transition of thought, an emotion or original impression produced by some other principle.

The question is, whether the emotion first produced be the passion itself, or some other impression related to it.

This question we cannot be long in deciding, For besides all the other arguments, with which this subject abounds, it must evidently appear, that the relation of ideas, which experience shews to be so requisite a circumstance to the production of the passion, would be entirely superfluous, were it not to second a relation of affections, and facilitate the transition from one impression to another.

If nature produced immediately the passion of pride or humility, it would be compleated in itself, and would require no farther addition or encrease from any other affection.

But supposing the first emotion to be only related to pride or humility, it is easily conceived to what purpose the relation of objects may serve, and how the two different associations, of impressions and ideas, by uniting their forces, may assist each other's operation.