T 2.3.4.9

'Tis certain nothing more powerfully animates any affection, than to conceal some part of its objectsobject by throwing it into a kind of shade, which at the same time that it shews enough to pre-possess us in favour of the object, leaves still some work for the imagination. Besides that obscurity is always attended with a kind of uncertainty; the effort, which the fancy makes to compleat the idea, rouzes the spirits, and gives an additional force to the passion.