make an easy transition from one idea to another. However uncertain and changeable our thoughts may be, they are not entirely without rule and method in their changes. They usually pass with regularity, from one object, to what resembles it, is contiguous to it, or produced by it[1]. When one idea is present to the imagination; any other, united by these relations, naturally follows it, and enters with more facility, by means of that introduction.
The second property, which I shall observe in the human mind, is a like association of impressions or emotions. All resembling impressions are connected together; and no sooner one arises, than the rest naturally follow. Grief and disappointment give rise to anger, anger to envy, envy to malice, and malice to grief again. In like manner, our temper, when elevated with joy, naturally throws itself into love, generosity, courage, pride, and other resembling affections.
In the third place, it is observable of these two kinds of association, that they very much
assist
