St. Thomas Aquinas Cosmological Argument

St. Thomas Aquinas’s first cosmological argument, the prime mover, defines things in the world as being either in a state of potentiality or in a state of actuality. Those things that are in potentiality are things that have the capability of being reduced to another form. Such as a boy is potentially a man, or tree is potentially a house. Things that are in a state of actuality are things that are currently reaching their potential; such as that boy becoming a man, or that tree becoming that house. Aquinas observed that all things in a state of actuality had to have been put into that state by something that was already in actuality. In thinking about this he concluded that there would have to be an infinite regress of actual things making potential things actual. He concluded that this would be impossible because given that, there would be no first mover. He instead, postulated that there must be a first mover. A being that never had potential but only has existed in a state of infinite actuality. That what we call God.

- St. Thomas Aquina interpreted Aristotelian philosophy from a Christian perspective. Aquina also gave five proofs for God’s existence; motion, efficient cause, possibility and necessity, degrees of perfection and design. The first way was natural things are in motion. If something is in motion, then it must be set into motion by something outside of itself. There

Therefore the universe (cosmos) has a cause c) That cause is God d) Therefore God exists. For this to follow Aquinas has to exclude the possibility of infinite regression; i.e. events with their previous causes going back in time forever).

This argues that everything in this world has possibility to be and not to be.

The arguments made by Aquinas at first seem to be powerful. However, when examining and taking a closer look the arguments don’t seem to be as

To prevent the possible hypothetical problem of infinite regression, Aquinas believes in an unmoved mover. Based on the foundations of Aristotle’s God the unmoved mover who thinks about nothing but himself as in thinking about other things would cause movement and contradict his state of unmovement. In the same way, Aquinas adopts the same model of an unmoved god who first puts other things in motion. However, unlike Aristotle, Aquinas merely adopts the idea of contingency to postulate a non-antideity. From the bases of causation and motion we arrive at two attributes of God ‘unmoved mover’ and ‘uncaused first cause’. with motion, “nothing else than the reduction of something from potentiality to actuality” therefore cannot be simultaneously in actuality and

In the article, “The Five Ways,” from Summa Theologica, Thomas Aquinas argues whether God exists, which

The ideas that God is altogether simple and that he has complete knowledge of himself and all things form the foundation for much of Aquinas' arguments for the existence of a world of contingent beings, deriving from a necessary being. Aquinas continues this line of reasoning in his argument that God's knowledge is the cause of things. Aquinas likens this relationship to the artificer and the art. The artificer, working through his intellect, creates the art. As Aquinas says, "Hence the form in the intellect must be the principle of action." Aquinas also says, "Now it is manifest that God causes things by his intellect, since his being is his act of understanding; and hence his knowledge must be the cause of things, insofar as his will is joined to it." Aquinas is saying here that if God's intellect creates things, i.e. human beings, then he must also be the cause of those things because his intellect is the same thing as his will. Keeping in mind that God is altogether simple, this conclusion naturally follows a logical sense of reasoning.

Without a first mover there can be no motions, this is Aquinas’ third arguments as to god existing through motion. Nothing can move itself. In other words, if you take away something that can actually be moved then you’re also taking away anything that can potentially be moved. For example, there is no milk without a cow. “the reason a student has the potential to be awake is that he had (actual) toast for breakfast. Toast has the potential to keep the student awake. But (actual) bread has the potential to become toast, and actual grain has the potential to become bread. Actual water, dirt, and air have the potential to become grain. To take away any of these actualities is ultimately to take away the potential for the student to be alert”

Therefore, it is more believable that the universe had a beginning and a personal creator. The third of Aquinas' ways is the argument of contingency. The world consists of contingent items- items that have a property are items referred to as 'being.' These items are generated and perish; they have a beginning and an end.

St. Thomas' first proof is based on the argument of motion. By our natural senses, we know that the earth and the universe are always in motion. However for Aquinas, the term motion did not just mean physical motion but also change as in change from potential to actuality. He reasoned that all change is the result of a cause and as such nothing can move or change itself. He also noted that the sequence of motion cannot be traced back infinitely and so there must be a first mover who is unmovable and that being is God.

Thomas Aquinas theorized five different logical arguments to prove the existence of God utilizing scientific hypotheses and basic assumptions of nature. In the fifth of his famous “Five Ways”, Aquinas sets forth the assumption that all natural bodies move toward an end. Since bodies are constantly moving in the best way possible to achieve that end, the path must be designed. God, of course, is the ultimate designer of the universe.

Here Aquinas argues that everything that happens is the cause of something, but nothing can cause itself. If we trace back a cause all the way back to the beginning of the world, it could not have caused itself. Therefore, God must have been the first cause. Aquinas’ third proof is the Argument from Contingency. We see that everything here on earth is finite. People die, empires fall. All things must come to an end. That means things had to have a beginning where nothing was in existence yet. How did things come into existence? God. Aquinas’s 4th argument is the Argument of Degrees. Here we judge things to be a certain degree of good or bad. But what are we comparing that to? If they have a certain degree of good and bad, then what is the greatest degree of good? And that must be God. Aquinas’s final argument is his Argument from Design. Perhaps one of his strongest arguments Aquinas says that there must be an intelligent designer behind everything. Random objects don’t have any brains to act the way they do. But they are directed in the way they act by God.

St. Thomas Aquinas is a famous philosopher from the medieval period who believed there was a god. One of Aquinas significant works in philosophy was his argument that God exists. In Aquinas' argument, or also known as Summa Theologica, he uses five arguments to support the claim that God exist and four of them are cosmological argument. Cosmological arguments are arguments that try to reason that god exists because of the universe or cosmos leads to the conclusion that god exists. His first argument is the Argument From Motion. In the argument of motion Aquinas observed that we live in a world and universe that things are continuously moving, and he also noticed that to make something move something has to move or start it moving. To Aquinas this means that everything that is moving must have been moved by something or someone and there had to be a time when the thing wasn't moving. The mover for the beginning of everything in Aquinas' argument is God. The second argument is the Argument From Causation which is very similar to the Argument From Motion. Aquinas thoughts were that everything that is caused had to be caused by something else. Nothing can cause it's self so there must be an thing that is uncaused and to Aquinas that thing is God because it can't go back forever. The Third argument is The Argument From Contingency. Contingency is a future or thing that could have not existed and Aquinas believe that the world can't always be contingent because then it could have

Aquinas's fifth proof relates more directly to "Science Finds God." This article states that the complexity of the natural world is more evidence that God must exist. Thomas says that there is some pure act of intelligence that causes all other acts of intelligence. As an archer shoots an arrow towards its target, God aims everything to its ultimate end. Everything is ordered towards an end and that end is determined by a being we call God. Using empirical sciences, it is evident that everything has its purpose and functions for