¥ 
we Ag 
20 ESSAYS ann OBSERVATIONS 
dered as an effect, it can only be compared 
to figure or colour, with regard to that part — 
of it which is paft: what part remains to be 
performed, is fo far from a compleated effect, 
that it is not fo much as commenced; and 
therefore muft neceflarily be conceived as a 
different effect, to the production of which 
there muft be a new exertion of power. 
Motion then is a continued effe&, or rather 
a feries of different effects, to require a caufe 
in continued action. Accordingly, when 
we attend to our own perceptions, we do not 
inquire for a ccufe, when a body ceafes to 
move. If the caufe of the motion ceafe, 
we feek no other reafon for the ceafing of 
the motion. If a thing fo evident can ad- 
mit of illuftration, let us figure an animal.in 
motion. Jt never came into the mind of a- 
ny perfon, that a man is paffive in the action 
of walking or running. In this cafe we rea- 
fon juftly, that walking or running requires 
a continued exertion of power. It requires 
no exertion of power to put an end to thefe 
motions. Themanhas but to forbear to ex- 
ert his power, and reft enfues. In this mat- 
ter there is no difference betwixt animate ahd 
inanimate beings; not even tho’ it fhould be 
fuppofed 
