contrasts, as variable, rapid and significant, and as inapproachable, as the subtlest interplay in light of natural forces.

In this relation of the physical structure of man to the organic structures of the world, we have (1) protracted and complete preparation by the lower for the higher. This slow accumulation of organic powers in specific lives, this diffusion of them in many forms, in many lives, have plainly before them this enlarged ulterior service for man, their chief possessor. We have also (2) a reshaping of the lower by the higher. Reason at once takes the initiative, enlarges and represses the powers beneath it for its own ends. Thus instinct rapidly disappears. We have further (3) a thorough use of the lower by the higher. The organic powers which have prepared the way for reason become subject to it. Reason lays hold of organic life and associative life as instruments in its work. It gains skill, but the combinations of skill and the labors of skill it passes over to the organic structure. It judges, but it treasures judgment in association. These are the pack-horses in its train, bearing the spoils as it moves on to new conquests.

(4) Under this law of development reason comes in as a new term, and the development itself is henceforth constructed more and more in reference to it. We speak of educating the senses; it is impossible to educate them without an accompanying education of the mind. The eye sees as the mind directs and interprets. The muscles discriminate in execution what the mind discriminates in conception.