Aquinas’s ‘First Way’ Argument: In What Way Does it Prove God’s Existence? | Prof. Gregory Doolan
The Thomistic Institute
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The Language of Impossibility
Aquinas: It is impossible that something be in potency, both in potency and in act. He's using the language of impossibility in the strictest way to say that it violates a fundamental law of reality. The so-called principle of non-contradiction holds that something cannot both be and not be.
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