4i6 ANTIENT METAPHYSICS. BookV. 



permit. — // admits^ hoiaever^ of fome Variety.— TWx^ Hypothefts^ 

 that Body is the only Moving Power — admits of great Variety. — 

 I ft, It may be fuppofed that the Body in the Centre is the Catfe of 

 the Motion of the Planet. — 'This^ if triie^ a great Difcovery of Modern 

 Times. — 2do, // maybefippofcd that the Planet is moved /^j'Pulfion, 

 both in the Proje£tile aiid Centripetal Line. — This Suppoftion has 

 fome Simplicity and Uniformity in it. — 3dly, // may be fuppofed that 

 the Planet is ntoved by Pulfion in the one Line^ and Trufion in the 

 other. — This Suppoftion not fo fimple as the preceding. — -The fourth 

 Hypothefs^ that the Planet is moved both by Body (7;/^ Mind. — Thisy 

 too., admits of confderable Variety. — Thefe are all the Opinions pof- 

 fiblc concerning the Planetary Motion. — Of thcfe the reader may 

 choofe what he likes bef. — Conclufon of the Book. — Su7n7nary of what 

 the Author thinks he has proved conceriiwg Mind and Body. — Sir 

 Ifaac Newton's Principia, though not a Pbilofoj)hical Work^ fif" 

 Jii/Jjes ample Matter to the Philofopher. 



IN the preceding Chapters, I have endeavoured to prove, ffff^ 

 that Motion produced by Impulfe cannot go on for ever, nor, 

 indeed, at all, by virtue of that Impulfe, nor by virtue of any Vis 

 infita in the Body moved ; and that, therefore. Sir Ifaac's Firft Law 

 of Motion cannot be defended, unlefs it be confidcred as only aflert- 

 ing that Body is perfe<3;ly Paflive, and can neither of itfelf begin 

 Motion, ftop it, or alter its diredion, fo that it muft always continue 

 in the fame State of Reel or of Motion (if we will ipeak fo improperly), 

 unlefs its State be changed by fomething elfe, and can no more ftop 

 its own Motion than begin it. ido^ That the Celeftial Bodies are not 

 moved by Pulfion, or Trufion, nor in any way refembling that 

 in which Body moves Body, but by Mind adting, not upon the fur- 

 face of thefe Bodies, but upon every particle of them. 3/'/o, That 

 Mind moves thefe Bodies in the moft firaple and diredt way poffible, 



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