Having premis’d these things, I shall proceed to enquire, after what manner Nature endeavours to clear her self of some few Distempers, which I shall consider in their proper place, and likewise how she may the more easily succeed in those Endeavours, if duly assisted by moderate Exercise; which Assistance, if it at first View may seem too slow and gentle to produce so great Effects, will yet with the Allowance justly due to all sorts of Alterative Physick, _viz._ of a Habit or frequent Repetition, appear to be sufficient to procure those Ends I shall assign to it. There is this Difference between the most compleat Productions of Humane Artifice, and that Divine Piece of Mechanism, the Body of Man, that the former are always the worse for wearing, and decay by Use and Motion; the latter, notwithstanding the Tenderness of its Contexture, improves by Exercise, and acquires by frequent Motion an Ability to last the longer; and tho’ the Circulation, and continual and infinite Succession of Particles, are the immediate Cause of Life, yet the Health, the Strength, the Well-being of the Individual, is in great part owing to the Effects of a General Motion superinduc’d to these internal Motions; which it is so far from disordering, that it aids and assists ’em to a greater degree than we are wont to imagine; for in our Considerations of the Animal Oeconomy, we seem to regard Nature only as in a quiescent State, without a due Allowance for the Alterations caus’d by the Motion of the whole, which yet are confess’d by all to be sometimes of great Consequence: for that General Motion acting both on the Fluids and Solids of the Body, may sometimes prove the last and best Resort for the Restoring the _Æquilibrium_ between ’em.