  Next, the motion and rest of a body must arise from another body…whatever arises in the body must have arisen from God insofar as he is considered to be affected by some mode of extension, and not insofar as he is considered to be affected by some mode of thinking (also 2P6), that is, it cannot arise from the mind, which (by 2P11) is a mode of thinking. This was the second point. Therefore, the body cannot determine the mind, and so on, q.e.d.