§ VII. There is, however, in the north an animal activity which materially aided the system of building begun in mere utility,--an animal life, naturally expressed in erect work, as the languor of the south in reclining or level work. Imagine the difference between the action of a man urging himself to his work in a snow storm, and the inaction of one laid at his length on a sunny bank among cicadas and fallen olives, and you will have the key to a whole group of sympathies which were forcefully expressed in the architecture of both; remembering always that sleep would be to the one luxury, to the other death. § VIII. And to the force of this vital instinct we have farther to add the influence of natural scenery; and chiefly of the groups and wildernesses of the tree which is to the German mind what the olive or palm is to the southern, the spruce fir. The eye which has once been habituated to the continual serration of the pine forest, and to the multiplication of its infinite pinnacles, is not easily offended by the repetition of similar forms, nor easily satisfied by the simplicity of flat or massive outlines. Add to the influence of the pine, that of the poplar, more especially in the valleys of France; but think of the spruce chiefly, and meditate on the difference of feeling with which the Northman would be inspired by the frostwork wreathed upon its glittering point, and the Italian by the dark green depth of sunshine on the broad table of the stone-pine[52] (and consider by the way whether the spruce fir be a more heavenly-minded tree than those dark canopies of the Mediterranean isles).