Descartes’ idea of God as an infinitely good being is based on the Catholic interpretation of the nature and attributes of God. This assumption is certainly not beyond doubt as it is not necessarily true that God is a perfect being. Descartes gives prime importance to the existence of God and writes in the Fifth Meditation that ‘‘certainty and truth of all knowledge depends on cognition of the one true God’’. It could be argued, however, of the opinion that Descartes’ comments can not be taken at face value and that the Cogito is central to Descartes’ epistemology, not the proofs for the existence of God.