Le Grand’s contribution to the Cartesian account of motion may either be seen as an extension or a revision of Descartes’s, sometimes ambiguous, treatment. Le Grand took seriously the claim that God is the total and efficient cause of motion in the universe, and that matter is entirely passive, and hence bodies are incapable of self-movement, or of moving other bodies. In his Entire Body of Philosophy, he argued that since a body may be in motion or at rest, motion must be a mode non-essential t