38a' ANTIENT METAPHYSICS. Book V. 



Motion tvithout example. — All the Motions, ive knozu, ^7 Mind, ^r^ 

 fimplc and compounded. — Objee'tion, that the Circular or Elliptical 

 Motion is necejfarily compounded. — Anjiver to this Objeclion. — The 

 Argument for the Compofition of the Motion 0/ the Planetsyrowz the 

 Jiippo/ed CovnpoCiuon of the Motion ofProjc^iles^anJiuercd. — One dif- 

 ference betivixt the tivo Motions /j, that /^f Motion of the Projediles is 

 begunby Impulfe— M0//0 the Motion o/'r^^? Planets. — Another is^ that 

 /^(? Planets have not the fame tendency to their Centre, that Projediles 

 have to the Centre of the Earth. — That the Planets havefuch a 

 Tendency i not proved by any jufi Argument from Analogy, nor 

 from Final Caufes. — But even the Motion of the Projeclile not com- 

 pounded. — This proved from /^^ Nature of the Motion. — ObjeSiion 

 anfivered^ that the Projedile Motion may be divided. — f the Pro- 

 jedile Motion be not compounded, neither is the Motion of the 

 Planets ; but it is a fimple Motion by Mind. 



IF the antient faying be true, as I believe it is. That there is a Sym- 

 pathy of things above with things belov^r*, we cannot doubt but 

 that there is a Refemblance betwixt the Motions here on Earth and 

 thofe in Heaven ; nor, indeed, is there any thing more natural, than 

 that there fhould be a conformity betwixt the Motions of the Bodies 

 upon this our Planet, and of the Planet itfelf, as well as among the 

 Planets themfelves. This Conformity, however, will only be where 

 the nature of the things is the fame ; for, if that be different, and 

 if the order and oeconomy of the Syftem require that the Motions 

 of the Planets fhould be different, in any refpedt, from the Motions 

 of Bodies upon their furface, we may be aflured that it is fo. 



And there is one difference that is obvious, namely, that it is ab- 

 folutely neceflary, that, here on Earth, Bodies fhould be moved by 



Impulfc 



