Rene Descartes In Proving the Existence of God.

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… is really distinct to Descartes that his ideas are great and could not have been thought of by himself, does not necessarily mean that there is a God who plants them in his head. The cosmological theory is also left wanting because, how could there be an uncaused cause? Although Descartes tried his hardest, it is futile to prove that God exists, and that the body and soul are separate by using reason alone.