Descartes declares he has to determine if there is a God and if he does exist, whether he can be a deceiver. The reason he has to determine the existence of God and what he is, rests in his theories of ideas. This is because we do not know if there is an outside world and we can almost imagine everything, so all depends on God’s existence and if he is a deceiver. “To prove that this non-deceiving God exists, Descartes finds in his mind a few principles he regards as necessary truths which are evident by the “natural light” which is the power or cognitive faculty for clear and distinct perception.” If arguments is presented in logical trains of thought, people could not help but to be swayed and to understand those arguments.
Natural light
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However since we already have an idea of God as this perfect and infinite being, he must exist. Furthermore, since the natural light clears deception as an imperfection as well as not existing, God is a non-deceiver, he exist and is perfect.
After the cogito argument and natural light examination of the deceptive God, Descartes discards the hypothesis that God is a deceiver. Since God is all-good, he would not deceive us. For that reason, Descartes introduces the evil demon/genius instead. Descartes assumed first that it was God, who deceived us, but with the conclusion that God is all-good, he instead conclude that an evil demon exist. This evil demon possess the same power to deceive us, which God also would possess.
God is perfect. Since humans have the ability to think of a being more perfect then themselves, then this being must have planted the idea in our mind. With the knowledge now that God is existing, perfect and is a non-deceiver – due to him being all-good –, Descartes can now move on to explain why material objects
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One goes by the name “Cartesian spiral”. This suggests that the distinct and clear perception that proves Gods existence is different from the other perceptions. The Cartesian spiral is based on a mathematical equation, as “2+2=4” is clear and distinct, but a judgement and that is open to error. While the clear and distinct perception of Gods existence is just an idea and with no judgement attached.
We know clear and distinct perceptions independently by God, and his existence provides us with a certainty we might not possess otherwise. However, another possible strategy would be to change Gods role in Descartes philosophy. Instead of seeing God as the validation of clear and distinct perceptions, rather see him as a safeguard against doubt. This strategy, however, is a problem since it re-constructs the Meditations – Philosophical work of Descartes –.This is because it would not be God, who is the ultimate foundation of knowledge, but the clear and distinct