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Explain how Aquinas uses the three Cs to prove the existence of God

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Megan Williams Religious Studies Philosophy September 22nd 2012 The Cosmological argument Explain how Aquinas uses the three C?s to prove the existence of God (30 marks) Cosmological is from the Greek word Cosmos meaning the universe. The Cosmological Argument is a posteriori argument and uses evidence around us to prove that God exists, the main evidence used is that the universe exists but doesn?t need to therefore something/one must have created it. St Thomas Aquinas wrote a book the Summa Theologica which explains his proof that God exists using change, cause and contingency, it is heavily influenced by Aristotle. The Cosmological Argument seeks to establish the prime mover and argues there has to be an ultimate explanation for the world?s beginning otherwise nothing can be accounted for. ...read more.


For example a baker has to be a baker to make a cake and can?t be a builder trying to make a cake otherwise it wouldn?t work. Aristotle used the example of a block of marble having the potential to become an actual statue however the efficient cause needed is a sculptor, without a sculptor the marble cannot become the statue. Potentiality + Efficient Cause = Actuality. Something must have had the potential to become the universe however needed the efficient cause so that it could become the universe. Aquinas said whatever is moved has to be moved by something else which tells us a chain is created, however there has to be a point where something created the first movement to start this chain of movement off. ...read more.


Therefore the cause is either the pushing of the domino or another domino falling into another,the effect is the domino falling. If there is a chain of causes and effects there must have been one cause of the universe and one thing that caused this, which Aquinas believes to be God. The third C, Contingency The universe exists however is not necessary and so does not need to exist. The idea of contingency is that everything has the possibility of not existing but has to rely on something to else to exist; therefore something that made the universe has to be non-contingent. Aquinas argued that at one point nothing existed but now things do exist and so there has to be something non-contingent. God is non-contingent and therefore has necessary existence. These are the rules St Thomas Aquinas used in his book of Summa Theologica to explain the cosmological argument and the existence of God. ...read more.

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