Ontology Vs. St. Aquinas's Cosmology

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God’s Existence: St. Anselm’s Ontology vs. St. Aquinas’s Cosmology

St. Anselm, Archbishop of Canterbury (1033-1109) offered quite fascinating and puzzling argument for God’s existence in “Proslogion” – a sample of ontological argument, i.e. the one that is based solely on concepts and logical links and relations, but not on someone’s real experience or knowledge.

In other words, his argument consists of a priori statements based only on reason and logic. It is similar to saying “if you spend at least 3 days for writing this assignment, then you spent for writing it more than 2 days”. So, Anselm demonstrates us a string of suppositions and premises.

At first he states that God is “something than which nothing greater can be thought” or in other words, by definition, the greatest being one can only imagine. …show more content…

Thomas Aquinas (1225-1274) as one of medieval theology scholars and famous thinkers who didn’t accept Anselm’s way of thinking. He offered his own alternative – well-known cosmological argument – and summarized it in detail in his “Summa Theologia” or “Treatise on God”. He states that existence of God can be confirmed without doubt in five ways or by five proofs. The first proof or the theory of the “unmoved mover” seems to be the most obvious, compelling and clearly stated confirmation of God’s existence.
Certain things in our world are in constant motion (or sustaining constant changes), Aquinas assumes. And naturally the things or objects that are currently in motion are put in this motion by other objects that are in motion as well. The mentioned other objects had to be put in motion by some other things or objects that preceded them and so on. Whatever is moved must be moved by something else. However, such situation cannot go to infinity, Aquinas states, as there must be the very first mover, the unmoved one, or the source of all motion or changes in the world. And this very first original mover is to be

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