What is Classical Theism? (Part 1)

What is classical theism? It’s important enough to become the name of my website.

Catholic Philosopher Edward Feser writes:

I have often complained that it is not just New Atheist types, but too many contemporary Christian thinkers, who are operating with a seriously deficient conception of God and a seriously deficient set of background metaphysical assumptions. (source)

While evidence for the existence of God abounds (see here for some examples), not all arguments for God are created equal. Some are best viewed as signposts while others purport to be metaphysical demonstrations.

Much of popular contemporary apologetics makes use of signposts, inferences to the best explanation, and cumulative case arguments. For examples of these arguments, I suggest the following works (currently on my shelves):

These evidences for God are typically probabilistic and reveal only a thin slice of the Divine nature. As a result, they are subject to the following common objections:

  • The conclusion of the argument may not be God, since it does not have a lot of the traditional attributes associated with God.
  • Perhaps there are many Gods (polytheism) or an uninvolved God (deism), which explain the phenomena under consideration.
  • Your argument uses God to plug up a current gap in our understanding. One day, science will explain your point away in purely natural terms.

This is not to say we should jettison signpost arguments. I find them to be extremely useful tools in evangelism. Sometimes, people crave just any evidence for God’s existence so that they know religious belief is not a blind impulse of the mind. It’s not always important that we spell out this evidence with philosophical precision.

Grace builds upon nature, and God works to draw different people in different ways. Some find signpost arguments persuasive and thereby gain confidence in their faith. However, these arguments are not the only game in town.

What Else is There?

As I indicated above, there are also metaphysical demonstrations for God’s existence. These demonstrations proceed from philosophical premises and data from common experience, not from weird or kooky phenomena.

Moreover, these arguments lead to the God of classical theism, rather than simply hinting at the probability of a vague supernatural entity. They conclude to a God who is pure actuality, absolutely simple, one, immutable, eternal, and self-existent. They bring us to a God with intellect and will who is omnipotent, omniscient, and good.

Polytheism or deism fail to remain a live option on principled grounds. These arguments reach the God of the philosophers whom Aristotle, Plotinus, Augustine, Avicenna, Maimonedes, Aquinas, Leibniz, and others showed could be reached by natural reason. A God whose existence has been grasped by Jewish, Christian, and Muslim philosophers through the ages.

This is the God of classical theism. At the First Vatican Council, the Catholic Church restated its commitment to this view of God:

The Holy Catholic Apostolic Roman Church believes and confesses that there is one true and living God, Creator and Lord of heaven and earth, Almighty, Eternal, Immense, Incomprehensible, Infinite in intelligence, in will, and in all perfection, who, as being one, sole, absolutely simple and immutable spiritual substance, is to be declared as really and essentially distinct from the world, of supreme beatitude in and from Himself, and ineffably exalted above all things which exist, or are conceivable, except Himself. (source)

What is a Metaphysical Demonstration?

Metaphysical demonstrations involve, of course, metaphysics i.e. the study of being and things that exist. Now, metaphysics does not consist in scientific examinations of physical phenomena. Rather, it is a philosophical discipline analyzing reality at a deeper level. It seeks to determine what must be true about things and reality independent of whatever the facts of chemistry, biology, and physics turn out to be.

So, metaphysical demonstrations involved metaphysical premises. Secondly, they are demonstrations in the sense that the premises follow from one another with deductive validity. Think back to proofs in high school geometry. Each step required justification, and prior premises show each subsequent premise to be true.

Moreover, since metaphysical demonstrations rest on philosophical premises that are more secure than scientific models and theories, they come with metaphysical certainty. In other words, as ambitious as this sounds, metaphysical demonstrations of God’s existence amount to proofs that God exists, and proofs that are more secure than results obtained in laboratory.

This is a big deal. And this is why more people need to know the arguments that lead to the God of Classical theism. What are these arguments? Well, if you want to dive right in, the book for you is Five Proofs of the Existence of God by Dr. Edward Feser.

In part 2 of this series, we examine one of these metaphysical demonstrations.

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