But eloquence is not always necessary. The bare opinion of another, especially when enforced with passion, will cause an idea of good or evil to have an influence upon us, which would otherwise have been entirely neglected. This proceeds from the principle of sympathy or communication; and sympathy, as I have already observed, is nothing but the conversion of an idea into an impression by the force of imagination.
'Tis remarkable, that lively passions commonly attend a lively imagination. In this respect, as well as others, the force of the passion depends as much on the temper of the person, as the nature or situation of the object.
I have already observed, that belief is nothing but a lively idea related to a present impression. This vivacity is a requisite circumstance to the exciting all our passions, the calm as well as the violent; nor has a mere fiction of the imagination any considerable influence upon either of them. 'Tis too weak to take any hold of the mind, or be attended with emotion.
[1] Mons. Rollin.
[SECTION VII.]
OF CONTIGUITY AND DISTANCE IN SPACE AND TIME.
There is an easy reason why every thing contiguous to us, either in space or time, should be conceived with a peculiar force and vivacity, and excel every other object in its influence on the imagination. Ourself is intimately present to us, and whatever is related to self must partake of that quality. But where an object is so far removed as to have lost the advantage of this relation, why, as it is farther removed, its idea becomes still fainter and more obscure, would perhaps require a more particular examination.
'Tis obvious that the imagination can never totally forget the points of space and time in which we are existent; but receives such frequent advertisements of them from the passions and senses, that, however it may turn its attention to foreign and remote objects, it is necessitated every moment to reflect on the present. 'Tis also remarkable, that in the conception of those objects which we regard as real and existent, we take them in their proper order and situation, and never leap from one object to another, which is distant from it, without running over, at least in a cursory manner, all those objects which are interposed betwixt them. When we reflect, therefore, on any object distant from ourselves, we are obliged not only to reach it at first by passing through all the intermediate space betwixt ourselves and the object, but also to renew our progress every moment, being every moment recalled to the consideration of ourselves and our present situation. 'Tis easily conceived, that this interruption must weaken the idea, by breaking the action of the mind, and hindering the conception from being so intense and continued, as when we reflect on a nearer object. The fewer steps we make to arrive at the object, and the smoother the road is, this diminution of vivacity is less sensibly felt, but still may be observed more or less in proportion to the degrees of distance and difficulty.