Below are two excerpts from A Philosophical Enquiry into the Origin of Our Ideas of the Sublime and Beautiful (1757) by Edmund Burke.

Of the Sublime

WHATEVER is fitted in any sort to excite the ideas of pain and danger, that is to say, whatever is in any sort terrible, or is conversant about terrible objects, or operates in a manner analogous to terror, is a source of the sublime; that is, it is productive of the strongest emotion which the mind is capable of feeling. I say the strongest emotion, because I am satisfied the ideas of pain are much more powerful than those which enter on the part of pleasure. Without all doubt, the torments which we may be made to suffer are much greater in their effect on the body and mind, than any pleasure which the most learned voluptuary could suggest, or than the liveliest imagination, and the most sound and exquisitely sensible body, could enjoy. Nay, I am in great doubt whether any man could be found, who would earn a life of the most perfect satisfaction, at the price of ending it in the torments, which justice inflicted in a few hours on the late unfortunate regicide in France. But as pain is stronger in its operation than pleasure, so death is in general a much more affecting idea than pain; because there are very few pains, however exquisite, which are not preferred to death: nay, what generally makes pain itself, if I may say so, more painful, is, that it is considered as an emissary of this king of terrors. When danger or pain press too nearly, they are incapable of giving any delight, and are simply terrible; but at certain distances, and with certain modifications, they may be, and they are, delightful, as we every day experience. The cause of this I shall endeavour to investigate hereafter.

The Sublime and Beautiful Compared

ON closing this general view of beauty, it naturally occurs, that we should compare it with the sublime; and in this comparison there appears a remarkable contrast. For sublime objects are vast in their dimensions, beautiful ones comparatively small: beauty should be smooth and polished; the great, rugged and negligent; beauty should shun the right line, yet deviate from it insensibly; the great in many cases loves the right line, and when it deviates it often makes a strong deviation: beauty should not be obscure; the great ought to be dark and gloomy: beauty should be light and delicate; the great ought to be solid, and even massive. They are indeed ideas of a very different nature, one being founded on pain, the other on pleasure; and however they may vary afterwards from the direct nature of their causes, yet these causes keep up an eternal distinction between them, a distinction never to be forgotten by any whose business it is to affect the passions. In the infinite variety of natural combinations, we must expect to find the qualities of things the most remote imaginable from each other united in the same object. We must expect also to find combinations of the same kind in the works of art. But when we consider the power of an object upon our passions, we must know that when anything is intended to affect the mind by the force of some predominant property, the affection produced is like to be the more uniform and perfect, if all the other properties or qualities of the object be of the same nature, and tending to the same design, as the principal.

If black and white blend, soften, and unite
A thousand ways, are there no black and white?

If the qualities of the sublime and beautiful are sometimes found united, does this prove that they are the same; does it prove that they are any way allied; does it prove even that they are not opposite and contradictory? Black and white may soften, may blend; but they are not therefore the same. Nor, when they are so softened and blended with each other, or with different colours, is the power of black as black, or of white as white, so strong as when each stands uniform and distinguished.