This man offered a proof for God in the third volume of a work which also suggests the existence of 
This man offered a proof for God in the third volume of a work which also suggests the existence of Innate, Fictitious, and Adventitious ideas. He demonstrated the fallibility of the senses with a melting piece of wax, known as his Wax Argument, and this man's final work was on emotions as the movement of spirits, which was titled "Passions of the Soul." This philosopher believed that the "seat of the soul" was in the pineal gland and is famous for his theory of mind-body dualism. For 10 points, name this French philosopher, the author of Discourse on Method, who famously stated that "I think, therefore I am."
This man offered a proof for God in the third volume of a work which also suggests the existence of Innate, Fictitious, and Adventitious ideas.
Rene Descartes