(3) As space, in which time is suspended, the body is enduring, and (4) as time, in which the

indifferent subsistence of space is suspended, the body is transitory. In general, it is a wholly

contingent unit. (5) But as the unity which binds together the two moments in their opposition, the

body essentially has motion, and the appearance of gravity.

Because the forces have been seen as only implanted onto matter, motion in particular is

considered to be a determination external to the body, even by that physics which is presumably

scientific. It has thus become a leading axiom of mechanics that the body is set in motion or placed

into a condition only by an external cause. On the one hand it is the understanding which holds