He projects this idea himself, and, thanks to his understanding and its complex relations with imagination and the senses, projects it in such different ways, and even alters his concept so often, that even if nature were a complete slave to his free power of choice, it would nevertheless be utterly unable to adopt any definite, universal and fixed law by which to accommodate itself to this ﬂuctuating concept and so bring itself into accord with the end that each individual arbitrarily sets before himself.