Where the vivacity arises from a customary conjunction with a present impression; though the imagination may not, in appearance, be so much moved; yet there is always something more forcible and real in its actions, than in the fervors of poetry and eloquence.

The force of our mental actions in this case, no more than in any other, is not to be measured by the apparent agitation of the mind.
A poetical description may have a more sensible effect on the fancy, than an historical narration.

It may collect more of those circumstances, that form a compleat image or picture.

It may seem to set the object before us in more lively colours.

But still the ideas it presents are different to the feeling from those, which arise from the memory and the judgment.