On the Sublime and Beautiful/Part II/Chapter 15

HAVING considered extension, so far as it is capable of raising ideas of greatness; colour comes next under consideration. All colours depend on light. Light therefore ought previously to be examined; and with its opposite, darkness. With regard to light, to make it a cause capable of producing the sublime, it must be attended with some circumstances, besides its bare faculty of showing other objects. Mere light is too common a thing to make a strong impression on the mind, and without a strong impression nothing can be sublime. But such a light as that of the sun, immediately exerted on the eye, as it overpowers the sense, is a very great idea. Light of an inferior strength to this, if it moves with great celerity, has the same power; for lightning is certainly productive of grandeur, which it owes chiefly to the extreme velocity of its motion. A quick transition from light to darkness, or from darkness to light, has yet a greater effect. But darkness is more productive of sublime ideas than light. Our great poet was convinced of this; and indeed so full was he of this idea, so entirely possessed with the power of a well-managed darkness, that in describing the appearance of the Deity, amidst that profusion of magnificent images, which the grandeur of his subject provokes him to pour out upon every side, he is far from forgetting the obscurity which surrounds the most incomprehensible of all beings, but               &#151;With majesty of darkness round Circles his throne.&#151; And what is no less remarkable, our author had the secret of preserving this idea, even when he seemed to depart the farthest from it, when he describes the light and glory which flows from the Divine presence; a light which by its very excess is converted into a species of darkness. Dark with excessive light thy skirts appear. Here is an idea not only poetical in a high degree, but strictly and philosophically just. Extreme light, by overcoming the organs of sight, obliterates all objects, so as in its effect exactly to resemble darkness. After looking for some time at the sun, two black spots, the impression which it leaves, seem to dance before our eyes. Thus are two ideas as opposite as can be imagined reconciled in the extremes of both; and both, in spite of their opposite nature, brought to concur in producing the sublime. And this is not the only instance wherein the opposite extremes operate equally in favour of the sublime, which in all things abhors mediocrity.