Chap. VII. ANTIKNT METAPHYSICS. 47 



Another important confcqucnce, and which defcrves particular at- 

 tention, of the Mind's being immaterial, is, that it cannot move Body 

 in the manner that Body moves Body, by the furface of the moving 

 Body impelling the furface of the Body moved ; for it is impoIRble 

 that Mind, not being material, and therefore having no furface, can 

 move Body in that way. 



The qucftion, then, is. In what manner docs Mind move Body ^ 

 And I fay it is by adting upon every particle of it, even the inmofl: 

 particles. And, accordingly, it is in this way that gravitation moves 

 Bodies, not in proportion to their furface, but in proportion to their 

 • mafs *. In the fame way Mind moves vegetables and animals, which 

 kind of motion in them is called Animcition. And it may be fo call- 

 ed, alfo, with refpedl to unorganized Bodies, as it moves them in the 

 fame manner. Of this I fhall fay a great deal more afterwards. 



Another very remarkable difference betwixt the operations of 

 Mind upon Body, and of Body upon Body, is, that, when Body 

 impels Body, the motion continues fome time after the impulfe ; 

 whereas Mind not moving Body by impulfe, but by inceffant ener- 

 gies, the motion continues no longer than the energy, but ceafes 

 when the energy ceafes. This we know with the greateft certainty, 

 from confcioufnefs, the fource of all our knowledge of the operations 

 of the Mind, and particularly its operations upon Body ; for, with- 

 out 



• In this way Sir Ifaac Newton, in his Scholhtm Cenerah^ fpeaks of gravitation, 



• Oritur utique haec vis a caufa aliqua, quae penetrat ad ufque centra folis et 



• planetarum, fine virtutis diminutione ; quaeque agit, non pro quantitate fuperfi- 



• cierum particularum in quas agit, (ut folent caufae mechanicae), fel pro quanti- 



• tate materiae folidac i' where Sir ll'aac fecms to acknowledge that Bodies fo mo- 

 ved are not moved mechanically ; and, if they are not moved mrchanically, they 

 muft be moved by Mind ; for, betwixt thefe two, there is no medium. 



