There stands in Florence a magnificent statue by Michel Angelo. A human figure is only partially hewn out of the stone. He never finished it. If you could have seen the master hewing the chips with hasty, impatient blows from the shapeless block, you would have been tempted to say that he was but a stonecutter, and but a hasty workman at that. Even now we do not know exactly what form and expression he would have given to the still unfinished head. But no one can examine it and hesitate to pronounce it a grand work of a master-mind. In any manifestly incomplete work you must judge the purpose and character and powers of the workman or artist by its highest possibilities, just so far as you have any reason to believe that these possibilities will be realized. You must look at the rudely outlined heroic human figure in the block of stone, not at the rough unfinished pedestal, if you would know Michel Angelo. So in the hydra and the annelid you must look at the possibilities of the nervous system before you or he think that digestion and muscle are all.
Once more the highest powers dawn far down in the animal kingdom. There are traces of mind in the amoeba, and of unselfishness in the lower mammals. If there were a goal of human development higher and other than unselfishness, wisdom, and love, we should have seen traces of it before this. But have we found the faintest sign of any such? Moreover, remember that a function continues to develop about as long as it shows the capacity for development. And during that period environment is a power making for its higher development. But is there any limit to the possible development of the three mental activities mentioned above? I can see none. Then must we not expect that environment will always make for these? And will environment ever manifest itself to man as the seat or instrument of a power possessing higher faculties other than these? Man must worship a personal God of wisdom, unselfishness, and love, or cease to worship. The latter alternative he never yet has been able to take, and society survive under its domination. So I at least am compelled to read the finding of biological history.
But let us grant for the sake of argument that man contains still undeveloped germs of faculties capable of perceiving and attaining something as much higher than wisdom and love as these are higher than brute force. You will answer, this is not only inconceivable, it is impossible. Still let us grant the possibility. We notice, first of all, that it is against the whole course of evolution that these faculties should be other than mental, and what we class under powers pertaining to our personality. For ages past evidently, and no less really from the very beginning, evolution has worked for the body only as a perfect vehicle of mind, and for this as leading to will and character. And human development has led, and ever more tends, as Mr. Drummond has shown, to the arrest, though not the degeneration, of the body. It is to remain at the highest possible stage of efficiency as the servant of mind. These higher powers will thus be mental and personal powers. And how has any and every advance to higher capabilities been attained in the animal kingdom? Merely by the most active possible exercise of the next lower power. This is proven by the sequence of physical and mental functions. We shall attain, therefore, any higher mental capacities only by the continual practice of wisdom and love. That is our only path to something higher, if higher there shall ever be. But if we find that the God of our environment is a God of something higher than love and righteousness, will these cease to be characteristics of his nature and essence? Not at all.