 Using a judicial figure of speech, he shows that the body, in law a person, in physics an ultimate component of matter, is indivisible.Never mentioning atomism, with that theory he comes close to the followers of Gassendi and to the free thinkers, the so-called Libertines.In his work "Le discernement du corps et de l’âme" (Discrimination between body and soul) he develops such thoughts which were criticized at that time by the followers of Descartes.