It was Gassendi's opinion, as may be seen in his objections to Descartes. I confess that by the natural reason alone we can make many conjectures on the soul, and have gratifying hopes, but no certainty. This system is a labyrinth, one lane of which would lead you to Spinozism, another to Stoicism, another to chaos. When one has had a good argument about spirit and matter, one always finishes by not understanding each other. No philosopher has been able with his own strength to lift this veil stretched by nature over all the first principles of things.
Men argue, nature acts.