A man, when calm or only moderately agitated, is so different, in every respect, from himself, when disturbed with a violent passion, that no two persons can be more unlike; nor is it easy to pass from the one extreme to the other, without a considerable interval betwixt them.
The difficulty is not less, if it be not rather greater, in passing from the strong passion to the weak, than in passing from the weak to the strong, provided the one passion upon its appearance destroys the other, and they do not both of them exist at once.

But the case is entirely altered, when the passions unite together, and actuate the mind at the same time.

A weak passion, when added to a strong, makes not so considerable a change in the disposition, as a strong when added to a weak; for which reason there is a closer connexion betwixt the great degree and the small, than betwixt the small degree and the great.
The degree of any passion depends upon the nature of its object; and an affection directed to a person, who is considerable in our eyes, fills and possesses the mind much more than one, which has for its object a person we esteem of less consequence.

Here then the contradiction betwixt the propensities of the imagination and passion displays itself.
When we turn our thought to a great and a small object, the imagination finds more facility in passing from the small to the great, than from the great to the small; but the affections find a greater difficulty: And as the affections are a more powerful principle than the imagination, no wonder they prevail over it, and draw the mind to their side.

In spite of the difficulty of passing from the idea of great to that of little, a passion directed to the former, produces always a similar passion towards the latter; when the great and little are related together.