René Descartes tried using reason alone to prove the existence of God, and that the soul is separate from the body. In the Meditations, he starts out by doubting completely everything and then progressively explains human existence, and then the existence of God. By using reason, he also attempts to prove that the soul is separate from the body. Although Descartes had some very excellent points, it is impossible to prove the existence of God by using reason, and it is near futile to deduce that the human existence is separable into two different parts. The first argument Descartes gives for the proof of God's existence relies on the content and cause of ideas. He contends that ideas have to come from somewhere. Do they come from within oneself, from the outside world, or are they innate? Since his idea of God was an infinite being, the cause of the idea must also be infinite.
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