The strangest part of it all is, that though wrought out by man as the instrument, and while acting in the capacity of a free agent, this spirit of progress is wholly independent of the will of man. Though in our individual actions we imagine ourselves directed only by our free will, yet in the end it is most difficult to determine what is the result of free will, and what of inexorable environment. While we think we are regulating our affairs, our affairs are regulating us. We plan out improvements, predetermine the best course and follow it, sometimes; yet, for all that, the principle of social progress is not the man, is not in the man, forms no constituent of his physical or psychical individual being; it is the social atmosphere into which the man is born, into which he brings nothing and from which he takes nothing. While a member of society he adds his quota to the general fund and there leaves it; while acting as a free agent he performs his part in working out this problem of social development, performs it unconsciously, willing or unwilling he performs it, his baser passions being as powerful instruments of progress as his nobler; for avarice drives on intellect as effectually as benevolence, hate as love, and selfishness does infinitely more for the progress of mankind than philanthropy. Thus is humanity played upon by this principle of progress, and the music sometimes is wonderful; green fields as if by magic take the place of wild forests, magnificent cities rise out of the ground, the forces of nature are brought under the dominion of man's intelligence, and senseless substances endowed with speech and action. It is verily as Carlyle says; "under the strangest new vesture, the old great truth (since no vesture can hide it) begins again to be revealed: That man is what we call a miraculous creature, with miraculous power over men; and, on the whole, with such a Life in him, and such a World round him, as victorious Analysis, with her Physiologies, Nervous Systems, Physic and Metaphysic, will never completely name, to say nothing of explaining."