Chap. VII. ANTIENT METAPHYSICS. 43 



HAP. VII. 



Of the Immateriality of WmA— Difficulty to conceive an immaterial 

 Subftance.- — This to be done by the method of AbR.r3L&.ion^ as ive 

 conceive a Point, Line, e^c. — Power, Energy, Activity, effential 

 ^alities of Mind. — That Poiver bejl feen in Motion — therefore 

 Mind defined by the'Power of moving. — Confequences o/"Mind being 

 an immaterial Subftance — has no Parts — is indivi/ible, and im- 

 moveable. — Another confequence isy that Mind moves Body in a 

 Manner quite different from that in ivhich Body moves Body. — It 

 moves unorganized Bodies in the fame manner as it moves Animals 

 and Plants. — !n>f Deity cannot be fuppofed to move Body in that 

 ivay. — Reafoning from Analogy on that Subje^. — Mind ?;z(?i;£'/ Body 

 in a manner quite different from that in ivhich Body moves Body. 

 — Confequences of that Difference. — We hiozu, therefore, infome 

 refpe^, hoiv Mind moves Body. 



UPON this fubjedt, of the immateriality of Mind, one great 

 difficulty, and perhaps the greateft of all, is to give an idea of 

 an immaterial Subftance, and to make it conceiveable that fuch a 

 Subftance fliould exift : This I have endeavoured to do in the 13th 

 Chapter of the 2d Book of my Firft Volume. I am fenfible I have 

 loft my labour with thofe who believe that we have no ideas, but 

 perceive things only by our fenfes and imagination ; for it is certain 

 that an immaterial Subftance can neither be apprehended by Senfe, 

 nor figured by the Imagination. But, with refpea: to thofe who 

 admit the exiftence of Ideas, and who are accuftomed to the abftrac- 



^ 2 tions 



