Rather let us note that sometimes there has been something rational in the minds of those who have required the Science of the practical or Ethic to be constructed independently of all Metaphysic. In truth, that programme of the independence of the Science of the practical or Ethic of Metaphysic has had various meanings that it will be well to enumerate briefly. The first meaning was that the Science of the practical, in so far as it was philosophy, should be independent of the _aggregate_ of the philosophical system (Metaphysic). In this case the claim was not acceptable, as we shall see, because it was at variance with the nature itself of philosophy, which is unity. The second meaning was that the Practical, as science, should be kept remote from every form of faith, or feeling or fancifulness (which has sometimes been called "Metaphysic"); and in this case the proposition was inexpugnable, however contestable may have seemed the opportuneity of the meaning given to that word. The third meaning was that the Science of the practical, in so far as it was descriptive, should stand by itself, in order to afford a base for philosophical induction. Use was here made of the erroneous idea, already rejected several times, of philosophy as an intensification of the psychological method, or as a carrying of it on. But in a fourth sense, it was desired finally to withdraw practical description from the perilous care of the philosophers, and it seems to us that with this fourth meaning was expressed a very just demand. [Sidenote: _Damaging consequences of the invasions._] What are, in fact, the consequences of the care that philosophers have bestowed upon practical description? We would not wish to use an over-coloured simile, but what happens is very much what would happen if a man were given a baby to suckle. He would press it violently against his dry and arid breast, incapable of nourishing, but well capable of tormenting it. Philosophy, when it approaches the empirical classes, will either begin to criticize their distinctions and abolish them, reducing several classes to one, and then reducing the reduced classes in their turn to a less number, until none are left at all and it finds itself in company with the universal philosophical principle alone, or alone with itself;--or it will contrive to preserve them as classes, deducing them philosophically, and will thus make them rigid and absolute, removing from them that elasticity and fluidity which they derive from their historical character, and converting them from useful classes that they were, into bad philosophemes, concepts contradictory in themselves. [Sidenote: _1a. Dissolution of the empirical concepts._]