The ending of this part can be called “surprise ending” because Descartes did not give a hint about his stance on God he was going to take later in his writing. He started with himself and the validity of knowledge and thinking process that it is because he thinks he exists. Later he went to physics, mathematics and geometry but the spiritual angle did not appear at any point until he truly stated about the existence of God. When Descartes found a particular piece of knowledge that he exists as thinking thing, he ...