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opinion upon the Vital Principle has been handed down, which to many is not less acceptable than any one of those already alluded to, but which, having been scrutinized in our popular disquisitions, has been found to be wanting. The supporters of this opinion say, that the Vital Principle is some kind of harmony; that harmony is a mixture and compound of contraries, and that the body is constituted of contraries. But although harmony is a certain proportion or compound of particles mixed together, it is not possible that the Vital Principle should be the one or the other; for it forms no part of harmony to produce motion, but all writers agree in assigning motive power to the Vital Principle as its most characteristic property. The term harmony, besides, is applicable rather to health and the corporeal powers in general, than to the Vital Principle, as would be very manifest to any one who should undertake to account, by any harmony, for the emotions and functions of the Vital Principle; for it would be scarcely possible to reconcile them to one another. If harmony, besides, may