Chap. III. ANTIENT METAPHYSICS. 71 



they be not convinced by the proof I have given a priori^ they ought 

 the more to attend to that which I am now to offer to them a pofterU 

 ori^ that is, by induBion from particular examphs ; which I hone v ill 

 make the diflindlon betwixt what moves and is moved^ obvioub to the 

 moft unphilofophical of my readers. 



Whether this diftindlion obtains in bodies inanimate that are tjwved^ 

 or whether it takes place even in other animal bodies, may not be fo 

 obvious to fome of thofe readers ; but, that it takes place in their own 

 bodies, they muft know, from the moft certain of all knowledge, con- 

 fcioufnefs ; for, w^hen they raifeup their arm, they know certainly that 

 it is not the arm that moves itfelf. If, indeed, they have any know- 

 ledge of anatomy, they will know that this motion is performed by 

 the machinery of mufcles, finews, and bones : But they muft know, 

 with equal certainty, that thefe do not tnove themfelves, but that they 

 are moved by an adt of their will : So that here the diftindion muft 

 be acknowledged, betwixt the moving povoer and the body moved: 

 And thus, in one work of nature, at leaft, we are perfe6;ly fure that the 

 body which is moved does not move itjelf. 



As to the works of art, every man, though he be not a mechanic, 

 but has 01 ly com.mon fenfe and obfervation, muft make a diftindtion 

 betwixt the moving povoer of any machine, and the vueight that is 

 moved by it. 



Now, this diftindion being thus eftabUflied, from thefe particular 

 inftances, both of nature and of art, it muft be extended from analogy 

 to every body that is in motion^ unlefs fome good rcafun can be given 

 to the contrary. That this analogy will go to the bodies of other ani- 

 mals, as well as man, will hard'y, 1 think, be denied ; but it cannot 

 ftop there, but muft go on to every other body that it in motion^ wi)e- 

 ther vegetable, or what is commonly called inanimate; and we muft 



fay 



