Thomas Aquinas's Five Arguments For The Existence Of God

Thomas Aquinas uses five proofs to argue for God’s existence. A few follow the same basic logic: without a cause, there can be no effect. He calls the cause God and believes the effect is the world’s existence. The last two discuss what necessarily exists in the world, which we do not already know. These things he also calls God. Aquinas’ first proof says anything currently in motion was put in motion by another thing. This “mover,” as he calls it, cannot also be the “moved.” The mover transfers its own actuality of motion into the moved, which until then only has the potentiality of motion. Since nothing can have both actuality and potentiality at the same time, the mover and moved cannot be the same thing. Since the universe is motion, it could not have been something from the universe which put it into motion. Therefore, there is a God who first put the universe into motion. Similarly, Aquinas discusses efficient causes. An efficient cause is what we simply refer to as a cause, in other words that which causes an action or event. The first efficient cause leads to

This is because it’s possible for everything both to exist and not to exist, therefore both possibilities must have been fulfilled at some point. He phrases it in those terms, but I believe his argument is better understood by saying everything which exists must have come into existence, and therefore didn’t exist before that. Since something cannot spontaneously come into existence, he believes, another being gave everything else existence. This is called a “necessary thing,” meaning its existence is necessary for the existence of other things. Aquinas believes a being bestowed its necessity onto itself and did “not [receive] it from another.” What was a paradox before, an object being both the cause and effect, is now the logic. This object is God, and gave existence to all other