PKT_VOL
Veni, Vidi, Vici
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. Descartes' own reason for god's existence is the fact that he could picture a god in his mind (and what else could have inspired that than God himself?)
What Descartes forgets to mention is that he was catholic and was taught about the existence and fear of God during his childhood. Bias is bias.
That's not exactly Descartes' theory.
He theorized that if God is the greatest thing we are capable of imagining, then God must exist, because something that exists is greater than something that does not.
Not sure I'm following you're wording correctly. So he meant God must exist because he can imagine God? What about imagining something that you were taught exists proves existence?
I'm not agreeing with the proposition.
However, the point isn't that God exists because we can imagine God. Even if no one ever thought up their own personal idea of God, God would still exist because God is the greatest thing that could possibly be imagined. Existence is greater than non-existence, so the greatest thing must exist whether or not it ever gets imagined.
I'm not really that great at clarifying philosophy.
Descartes argument which you are referencing is in his third mediation. Known as his "Causal Argument" for the Existence of God. Similar in ways to St. Augustine.
Premise one: Something cannot come from nothing.
Premise two: Formal reality and objective reality are essentially equal. Therefore, causation of formal reality may be comparable to objective reality.
Argument: Humans are able to think of perfect being that is omnipotent, omnibenevolent, and omniscient. This idea has infinite objective reality. However, humans are are finite and imperfect. Furthermore, they have limited formal reality (being finite vs infinite). The cause of such an idea could only come from a being with the same characteristics of the idea: infinite and perfect.
Same Argument (less philosophical language): Humans are able to think of perfect being that is omnipotent, omnibenevolent, and omniscient. Since there is nothing on Earth in which humans could possibly gain that idea via experience; such an idea must have come a priori. In essence, you must have been born with idea inherently planted in your mind. The only entity which capable of this feat is God.
Descartes gives another argument for the existence of God in Meditations V. Similar in ways to St. Anselm's "Ontological Argument."
The idea of the most perfect being (God) entails certain implied characteristics. Known characteristics of God: omnipotent, omnibenevolent, and omniscient, infinite, perfect. The latter being the most important. Perfect implies that God lacks nothing. Therefore, God could not lack existence. Essentially, the essence of a perfect God entails existence. As Descartes said, "We can no more think of God without existence than we can think of a mountain without a valley."