Aquinas’s ‘First Way’ Argument: In What Way Does it Prove God’s Existence? | Prof. Gregory Doolan
The Thomistic Institute
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Aquinas' Arguments for the Existence of God
Aquinas offers a number of arguments for the existence of God throughout his career. Most famously in his work, the Summa Theologiae, he offers five arguments that he calls the five ways. All of them follow the same basic pattern of reasoning from effect to cause. If you hear a knocking at the door, you know that that sound isn't sufficient to have caused itself. There must be something to account for that effect. This is how Aquinas is going to try to prove theexistence of God.
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