Descartes believed that the mind had more power than the body. Have you ever wondered if you exist or not? Well if you think about existing then you exist. That was Descartes' thinking. There also exist a paradox between the mind and the body, this relation is why you exist. He compares how the body cannot show that we exist besides feeling, but the mind makes us think. This comes into place because he thought that thinking was very important and thinking deserved more time. "I think therefor I am" refers to what I said earlier in the paragraph, because he think he exists.