BOOK I PART IV
parts are so situated, as to afford us the notion
of distance and contiguity; of length, breadth,
and thickness. The termination of these three
dimensions is what we call figure. This figure
is moveable, separable, and divisible. Mobility,
and separability are the distinguishing proper-
ties of extended objects. And to cut short all
disputes, the very idea of extension is copyed
from nothing but an impression, and conse-
quently must perfectly agree to it. To say the
idea of extension agrees to any thing, is to say
it is extended.
The free-thinker may now triumph in his
turn; and having found there are impressions
and ideas really extended, may ask his antago-
nists, how they can incorporate a simple and
indivisible subject with an extended percep-
tion? All the arguments of Theologians may