If anyone asks me the further question Why are we naturally so prone to divide quantity? I answer that quantity is conceived by us in two ways; in the abstract and superficially as we imagine it; or as substance as we conceive it solely by the intellect. If then we regard quantity as it is represented in our imagination which we often and more easily do we shall find that it is finite divisible and compounded of parts; but if we regard it as it is represented in our intellect and conceive it as substance which it is very difficult to do we shall then as I have sufficiently proved find that it is infinite one and indivisible. This will be plain enough to all who make a distinction between the intellect and the imagination especially if it be remembered that matter is everywhere the same that its parts are not distinguishable except in so far as we conceive matter as diversely modified whence its parts are distinguished not really but modally.