  The reason to distinguish between movement and force of movement lies in the fact that movement is just a modification of the body and no modification can be transferred from a subject to another. On the contrary, it is necessary to think that the same force of movement, which causes the motion of a body, applies differently to different bodies, and thus it must be really distinguished from them. It is important to note that if the force of movement is really distinct from anything extended, then it should not be conceived as properly ‘divided’. Divisibility is a property of extended things, and if the force of movement is not extended, then it cannot be divisible in the way in which distances or bodies are. The (re)distribution of the force of movement across different bodies has thus to be understood more figuratively, perhaps analogously to the Cartesian claim that the mind itself is equally present in the whole body and in each of its parts.