Hitherto of an idea of memory. I proceed to consider the idea of a thing I never saw, raised in me by speech, by writing, or by painting. This idea, with respect to the present matter, is of the same nature with an idea of memory, being either complete or incomplete. An important event, by a lively and accurate description, rouses my attention and insensibly transforms me into a spectator: I perceive ideally every incident as passing in my presence. On the other hand, a slight or superficial narrative produceth only a faint and incomplete idea, precisely similar to a reflective recollection of memory. Of such idea, ideal presence makes no part. Past time is a circumstance that enters into this idea, as it doth into a reflective idea of memory. I believe that Scipio existed about 2000 years ago, and that he overcame Hannibal in the famous battle of Zama. When I revolve in so cursory a manner that memorable event, I consider it as long past. But supposing me to be warmed with the story, perhaps by a beautiful description, I am insensibly transformed to a spectator. I perceive these two heroes in act to engage; I perceive them brandishing their swords, and exhorting their troops; and in this manner I attend them through every circumstance of the battle. This event being present to my mind during the whole progress of my thoughts, admits not any time but the present. I have had occasion to observe[26], that ideas both of memory and of speech, produce emotions of the same kind with what are produced by an immediate view of the object; only fainter, in proportion as an idea is fainter than an original perception. The insight we have now got, unfolds the means by which this effect is produced. Ideal presence supplies the want of real presence; and in idea we perceive persons acting and suffering, precisely as in an original survey. If our sympathy be engaged by the latter, it must also in some measure be engaged by the former. The distinctness of ideal presence, as above mentioned, approacheth sometimes to the distinctness of real presence; and the consciousness of presence is the same in both. This is the cause of the pleasure that is felt in a reverie, where a man, losing sight of himself, is totally occupied with the objefts passing in his mind, which he conceives to be really existing in his presence. The power of speech to raise emotions, depends entirely on the artifice of raising such lively and distinct images as are here described. The reader’s passions are never sensibly moved, till he be thrown into a kind of reverie; in which state, losing the consciousness of self, and of reading, his present occupation, he conceives every incident as passing in his presence, precisely as if he were an eye-witness. A general or reflective remembrance hath not this effect. It may be agreeable in some slight degree; but the ideas suggested by it, are too faint and obscure to raise any thing like a sympathetic emotion. And were they ever so