In the eleventh century, a brilliant logician, St. Anselm of Canterbury, come up with a celebrated proof of the existence of God. In the following argument, he imagines that someone has made the claim that “God does not exist,” and uses logic to prove its impossibility.
PROBLEM: Someone understands the statement that “God exists,” but claims that it is not true.
POSSIBLE OUTCOMES: Either God does not exist in reality, but exists in the mind (because we understand the statement “God exists” and can imagine him) or God exists in both mind and reality.
PROPOSITION 1: “God” is the name we give to the greatest thing we can imagine.
PROPOSITION 2: It is greater to exist in the mind and reality than only in the mind. (Or put differently, a real ice-cream is better than an imaginary one, no matter how good we imagine the imaginary one to be.)
SUMATION: If God existed only in the mind, it would be possible to imagine something in reality which was greater, but which was not God.
CONCLUSION: Therefore, in order to be the greatest thing possible, God must exist in reality.
Despite the neatness of Anselm’s approach, it has its problems. For Anselm, these problems begins when Saint Thomas Aquinas introduced the arguments of Aristotle’s about a First Cause. We remember how Aristotle talks about the mundane tangible things in the universe and he observes that if you push something, like a rock, then it moves and if that rock then hits something else, then it moves too? Well, Aquinas approached to the problem from a different starting position. He used things observable in the real world (clues) to lead to answers based on deduction.
Aristotle showed that each moving thing had to have been first moved. This could almost go back to infinity, he said, but not quite: at some point there had to be something which started it all, something which moves something else but which is not itself moved. Yes, it’s a bit like the chicken and egg debate) There must be, in Aristotle’s words, a Primus Motor, an Unmoved Mover. Aquinas therefore fused the two arguments together and suggested that we might as well call this Mover “God.”
Aquinas was able to solve his case because he was able to reject the “forward-logic” of the world around him and concentrate on the details. But how, I might ask can we refute this kind of deduction?
Tags: Aquinas, Aristotle, Christianity, Philosophy
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