2o6 ANTIENT METAPHYSICS. Book 11. 



aGlve in any wav, it Is for that reafon, I think, if there were no o- 

 ther, to be clafled under tnind. It is by it that bodies are difcrimina- 

 ted from one another, and receive different appellations, fuch as 

 earthy ftone^ ivood^ Szc. ; for, without this principle, nothing could be 

 called any thing, but all things would be mixed with all, according 

 to the philofophy of Anaxagoras. 



Secondly^ It is this principle which gives the feveral motions to bo- 

 dy, by which it may be faid to live, and to be animated. Of thefe 

 motions Ariflotle has made a general divifion, and which I think tull 

 and compleat, into fuch as are in a ftraight line, fuch as are in a 

 curve revolving into itfelf, and fuch as are mixed of thele two ; or, as 

 I would rather chufe to exprefs it, are neither the one nor the other. But 

 I will' divide them more particularly, beginning with thofe that are in 

 a ftraight line. 



Andj^r/?, there is that motion well known under the name of gra- 

 'vitation^ by which bodies here below tend towards the centre of the 

 earth. This motion, as 1 have oblerved, cannot be accounted for 

 from any material impull'e. It cannot be, as 1 think I have demon- 

 flrated, the matter itfelf which m.oves itfelf ; and, therefore, it only 

 remains, that it muft be produced by inind. And, indeed, as gravita- 

 tion does not operate in proportion to the furface of bodies, but to 

 their mafs or folid contents, it is impojGTible to conceive how it fhould 

 be produced by any material poiver^ as matter adts only upon the 

 furface of matter *. The only queftion, then, is, Whether it be mind 

 operating externally upon the body, or internally, that is, rcfiding in 

 the bodv, and animating it ? And I find tliat appears to have bren 

 a doubt ccmcerning the motion of the celeftial bodies in the days of 

 Plato ; for, though all the philofophers of thofe days, who were 



not 



♦ See this argument very well enforced by Dr Clarke, in his Demonftration of the 

 Being and Attributes of God, p. 83. 



