Page:The System of Nature.djvu/102

 not have seen, that his temperament, his constitution, did in no wise depend on himself — that his passions are the necessary consequence of this temperament — that his will is influenced, his actions determined by these passions; consequently by opinions, which he has not given to himself, of which he is not the master? His blood, more or less heated or abundant; his nerves more or less braced, his fibres more or less relaxed, give him dispositions either transitory or durable — are not these, at every moment decisive of his ideas; of his thoughts: of his desires: of his fears: of his motion, whether visible or concealed? The state in which he finds himself, does it not necessarily depend on the air which surrounds him diversely modified; on the various properties of the aliments which nourish him; on the secret combinations that form themselves in his machine, which either preserve its order, or throw it into confusion? In short, had man fairly studied himself, every thing must have convinced him, that in every moment of his duration, he was nothing more than a passive instrument in the hands of necessity.

Thus it must appear, that where all is connected, where all the causes are linked one to the other, where the whole forms but one immense chain, there cannot be any independent, any isolated energy; any detached power. It follows then, that Nature, always in action, marks out to man each point of the line he is bound to describe; establishes the route, by which he must travel. It is Nature that elaborates, that combines the elements of which he must be composed; — It is Nature that gives him his being, his tendency, his peculiar mode of action. It is Nature that develops him, expands him, strengthens him,