Husserl and Descartes on Ego cogito
Husserl admires Descartes and follows him up to a point, but from there on he goes on a different path. Husserl goes that far that he is willing to speak about phenomenology as a new twentieth century Cartesianism (Husserl, 1973, 3). According to Husserl the themes in Meditations are timeless and can give birth to what is characteristic of phenomenological method (Husserl, 1973, 3).
Continuity
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Descartes's Arguments for the Existence of God
Descartes in Meditation III offers two separate arguments for the existence of God. The first starts with the fact that everyone of us has an idea of God, and the second starts with the fact that it is certain that I exist.
The steps of the first argument are like this:
I have an idea of an infinitely perfect substance / such an idea must have a cause / from nothing nothing comes / so the cause of an idea must have at least as much formal reality as there is subjective reality in the idea / I am a substance, but I am not perfect / so I could not be the cause of this idea / so there must be a formal reality that is an infinitely perfect substance / so God exists. Read More...
The steps of the first argument are like this:
I have an idea of an infinitely perfect substance / such an idea must have a cause / from nothing nothing comes / so the cause of an idea must have at least as much formal reality as there is subjective reality in the idea / I am a substance, but I am not perfect / so I could not be the cause of this idea / so there must be a formal reality that is an infinitely perfect substance / so God exists. Read More...
Leibniz on God and the World
The main outlook on God, by Leibniz, in his Discourse on Metaphysics, is given towards the end of his argument when he says that ‘we must think of God not only as the root cause of all substances and of all beings, but also as the leader of all persons or thinking substances, or as the absolute monarch of the most perfect city or republic - which is what the universe composed of the assembled totality of mind is’ (Leibniz 1686, 35). To this I have to add what he says at the beginning of his argument that ‘God is absolutely perfect being’ (Leibniz 1686, 1). The perfection of God applies to his power, knowledge, wisdom, and actions; they are of highest degree, he has them in ‘unlimited form’ (Leibniz 1686, 1). These three metaphors of ‘root cause’, ‘leader,’ and ‘absolute monarch’ give me the structure of the answer to the question ‘What is God?’ and the related terms of ‘all substances,’ ‘thinking substances,’ and ‘the most perfect city’ give me the elements of the answer to the second question of this assignment 'What philosophical problems is Leibniz working through his contemplation of God?'