There are all degrees of proficiency in knowledge of the world. It is sufficient to our present purpose to indicate three. One class lives to the utility of the symbol, esteeming health and wealth a final good. Another class live above this mark of the beauty of the symbol, as the poet and artist and the naturalist and man of science. A third class live above the beauty of the symbol to the beauty of the thing signified; these are wise men. The first class have common sense; the second, taste; and the third, spiritual perception. Once in a long time, a man traverses the whole scale, and sees and enjoys the symbol solidly, then also has a clear eye for its beauty, and lastly, whilst he pitches his tent on this sacred volcanic isle of nature, does not offer to build houses and barns thereon reverencing the splendor of the God which he sees bursting through each chink and cranny.