or less effete and ready to succumb before fresh mental births taking place from within. The modern evolution theory would maintain that among many amoebas and descendant forms, one would at last by chance be born having the usual sensitiveness localised in a particular spot, and, surviving by force of this advantage, would transmit this "eye" to its posterity; or that in the progress of society, new economic conditions having arisen, that people would prosper best which most effectually and rapidly adapted itself to them. But though there is doubtless truth in this view, yet it seems, when all has been said, to be inadequate and even feeble; it omits at least one half of the problem. If we look at ourselves, as already pointed out, we see the two forces--the inner and the outer--acting and re-acting on each other. May it not be so in animals? Lamarck, poorly off, blind, derided, was a true poet. "Animals vary from low and primitive types chiefly by dint of wishing"--and the world laughed and still laughs. But it was his deep sympathy even with the worms and insects (which he studied till he could discern them with his mortal eyes no longer) that led Lamarck to see the human nature and the human laws that moved within them; and as his outward sight grew dim there arose before him the inward vision of the true relationship which binds together all living creatures--which was indeed a vision of divine things, and as different from the mere mechanism-theory of the survival of the fittest as the sight of the starry heavens is different from a governess's lesson on the use of the globes. On the theory of Exfoliation, which was practically Lamarck's theory, there is a force at work throughout creation, ever urging each type onward into new and newer forms. This force appears first in consciousness in the form of _desire_. Within each shape of life sleep needs and wants without number, from the lowest and simplest to the most complex and ideal. As each new desire or ideal is evolved, it brings the creature into conflict with its surroundings, then gaining its satisfaction externalises itself in the structure of the creature, and leaves the way open for the birth of a new ideal. If then we would find a key to the understanding of the expansion and growth of all animate creation, such a key may exist in the nature of desire itself and the comprehension of its real meaning. It is not certain that it can be found here; but it may be.