SECT. VII.—VASTNESS
GREATNESS〖Part IV. sect. 9.〗 of dimension is a powerful cause of the sublime. This is too evident, and the observation too common, to need any illustration: it is not so common to consider in what ways greatness of dimension, vastness of extent or quantity, has the most striking effect. For certainly, there are ways and modes, wherein the same quantity of extension shall produce greater effects than it is found to do in others. Extension is either in length, height, or depth. Of these the length strikes least; an hundred yards of even ground will never work such an effect as a tower an hundred yards high, or a rock or mountain of that altitude. I am apt to imagine likewise, that height is less grand than depth; and that we are more struck at looking down from a precipice, than looking up at an object of equal height; but of that I am not very positive. A perpendicular has more force in forming the sublime, than an inclined plane; and the effects of a rugged and broken surface seem stronger than where it is smooth and polished. It would carry us out of our way to enter in this place into the cause of these appearances; but certain it is they afford a large and fruitful field of speculation. However, it may not be amiss to add to these remarks upon magnitude, that, as the great extreme of dimension is sublime, so the last extreme of littleness is in some measure sublime likewise: when we attend to the infinite divisibility of matter, when we pursue animal life into these excessively small, and yet organized beings, that escape the nicest inquisition of the sense; when we push our discoveries yet downward, and consider those creatures so many degrees yet smaller, and the still diminishing scale of existence, in tracing which the imagination is lost as well as the sense; we become amazed and confounded at the wonders of minuteness; nor can we distinguish in its effects this extreme of littleness from the vast itself. For division must be infinite as well as addition; because the idea of a perfect unity can no more be arrived at, than that of a complete whole, to which nothing may be added.