In his book, God is No Delusion: A Refutation of Richard Dawkins (Ignatius Press, 2007), Thomas Crean, O. P., offers several arguments for God’s existence, the most intriguing of which is the following.
Fr. Crean begins with the question, “What is ultimate, mind or matter?” First, he asks us to consider necessary truths. What are those? He writes: “Something that is not dependent on chance or human choice, but which has to be the case,” such as “the proposition that the circumference of a circle is equal to twice its radius multiplied by π.” What is true about this proposition…
- It does not depend on the material world. For “material things are subject to this law; they don’t create it. The circular cross-section of a tree trunk… does not cause it to be the case that the circumference of any circle will equal 2πr.”
- Thus, “necessary truths are independent of the material objects that they govern. If there had never been a material universe, it would still have been true that the circumference of any possible circle will equal twice its own radius multiplied by π.”
- But if a necessary truth does not depend on the material universe, where is it if the material universe does not exist? In a mind, since it is an abstract object and abstract objects require minds.
- “So if we agree that certain things are true independently of material things, we must admit that at least one mind exists independently of material things.”