Greatness8 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; a hundred yards of even ground will never work such an effect as a tower a 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 ............