In my research paper, I am going to use Descartes’ Discourse on Method and Plato’s “Phaedo” from the Five Dialogues to support my argument. I’m going to argue that while Descartes uses a geometric method to obtain knowledge and Plato’s method tended to be more spiritual, underneath these differences the two methods are similar in some interesting way. Descartes claims that the true method to obtain knowledge is to turn within to study the self. He uses reasoning, logic, and the scientific method to prove a clear reason for his beliefs and tries not to leave anything to doubt. An example of when Descartes uses the geometric method is when he uses doubt to prove that something is certain. His method instructs to take our beliefs and subject them