Part one can be found here.

Part two can be found here.

It is true that natural theology reasons to a transcendent God based on the properties of being and the natural world, but the God that natural theology reasons to is far from an afterthought, or built on fictions. Many of the great Western philosophers such as Aristotle, Augustine, and Aquinas employ natural reasoning, appeal to being and becoming, logic, and the principle of causality to conclude that an eternal and necessary God exists. This is a very different approach than that of Spinoza’s and is worth investigating. From the standpoint of natural theology, it is illogical to presuppose that God exists in a sound deductive argument. Furthermore, according to natural theology, self-creation is a self-contradiction, and pantheism is impossible due to the laws of logic, contingency, and the principle of causation. Using this foundation, Augustine provides a helpful analysis from the perspective of natural theology.

Classical philosophers have found that natural theology is a powerful and thoughtful way to think about the existence of God. In fact, many thinkers of Western antiquity have used some form of argumentation based on the nature of Being, or reality, to reach their theological or cosmological conclusions. Natural theology is the approach many classical theologians and philosophers use to conclude the existence of a transcendent God. It is not a uniquely Christian way of argumentation either, because Plato, Aristotle, Jewish, and Muslim thinkers have used or adopted various versions of natural theology. Natural theologians and philosophers tend to focus on forms of the cosmological argument which reasons that God must exist as the ultimate cause of the contingent, physical universe.

There are many forms of the cosmological argument. In general, the argument follows from the contingency of the universe and usually adopts this line of thought: contingent, or caused, being depends for its existence on some uncaused being.¹ The universe is a contingent being, therefore, the universe depends for its existence on some uncaused being. Another way of the putting the argument is this: Something exists (myself, Being, etc.). Nothing cannot produce something. Therefore, something exists eternally and necessarily. It must exist eternally because if there was absolutely nothing, nothing would exist now because nothing cannot produce something. Non-being cannot produce being. Further, it must exist necessarily because not everything can be contingent. All contingent beings require a cause due to the principle of causality—whatever comes to be (contingent being) has a cause. In general, most Western philosophical theologians argue from some aspect of Being whether it is contingency, motion, apparent design, or causality and conclude that because nothing cannot produce something, something transcendent must exist.² The following analysis from Augustine provides additional insight into the nature and characteristics of Spinoza’s God and philosophical theology. In addition, Augustine appeals to logic and the natural order to make his case for the existence of God.

Interestingly, Augustine applies the law of noncontradiction when it comes to the nature and existence of the universe. The law of noncontradiction says that nothing can both be and not be at the same time and in the same relationship. As a property of being, the law of noncontradiction is fundamental to all thought, science, language, and is necessary to avoid definitional equivocation in correct reasoning. In addition, as a property of being, the laws of logic cannot be denied.³ The law of noncontradiction cannot be rejected in correct reasoning because it is self-evident and based on the idea that being and non-being are opposites and points to the nature of what is (reality). For something to exist, it cannot both exist and not exist at the same time or same relationship.⁴ To exist means to stand out of non-being or nothing. Being and non-being are opposites. Further, it is impossible to deny the law of noncontradiction without using the law in the denial. To say that the law of noncontradiction is false, assumes that the opposite of the claim is true. Opposites cannot both be true, which is the reason that the law of noncontradiction is foundational to all correct reasoning. This is important to keep in mind as Augustine draws on the law of noncontradiction and appeals to reality when he argues for the existence of God.

Augustine believes that the universe did not create itself and provides this natural theological argument based on the law of noncontradiction,

Earth and the heavens also proclaim that they did not create themselves. “We exist,” they tell us, “because we were made. And this is proof that we did not make ourselves. For to make ourselves, we should have had to exist before existence began.” And the fact that they plainly do exist is the voice which proclaims this truth. (Augustine, Vol. 16, 114)

Augustine is simply making the point that something cannot exist before it exists. If something did exist before it existed, it would have to be, and not be at the same time and same way, which is impossible according to the law of noncontradiction. In order for the universe to create itself, it must be before it is. Something cannot exist before it exists. Augustine thinks that self-creation violates the law of noncontradiction. According to the law of noncontradiction, the concept of self-causation is a contradiction. It is like saying there is an “uncaused effect” which is logically incoherent. Therefore, philosophers who hold to the natural theology methodology reject Spinoza’s concept of self-causation.

A natural theological approach rejects Spinoza’s rational presuppositionalism. The reason why, is that Spinoza’s methodology is circular in its reasoning. The presuppositional approach asks one to assume or presuppose that God exists in order to prove that God exists. According to Spinoza, God “is in itself and is conceived through itself” and “cannot be conceived unless existing.” In other words, “God is” (presupposition, one cannot think of God unless existing), therefore “God exists” (because a Perfect Being must exist). This is the heart of Spinoza’s methodology and presents an error in logic because the conclusion is present in the premises.⁵ It is the informal fallacy of begging the question. When the conclusion is present in one of the premises, the argument fails because it is circular and begs the question. It does little practical good when investigating the question of whether or not God exists, to assume that God exists in the first place. Finally, according to Augustinian natural theology, Spinoza’s pantheism is not correct because a transcendent cause of the universe is necessary. If the universe is contingent there must be something that is uncaused to create anything that may or may not exist. Self-creation is a self-contradiction.

On the question of God’s existence, Spinoza tells the inquirer to study the divine nature first (611), but the very question is whether or not the divine nature exists at all. On the other hand, a good valid and sound deductive cosmological argument will not (or should not) be circular. The existence of God is not assumed in a valid cosmological argument.⁶ Of course, no conclusion in a deductive argument can be stronger than the premises, but that is exactly where the conversation should take place (and does take place between philosophers of religion). Throughout intellectual history, there have been many doubts, challenges, and questions applied to the premises of natural theology and the cosmological argument, and that is perfectly good and appropriate. The circular reasoning of Spinoza’s overall rational presuppositionalism, however, is not helpful.

1 A contingent being is that which may or may not be or exist, any being which can be or can be made to exist or not exist.

2This is the general line of reasoning found in Aquinas’s “Five Ways” on pgs. 12 – 13 in Aquinas I, Vol. 17.

3 The three primary laws of logic are noncontradiction, excluded middle, and identity. They were first explicated by Aristotle in his Physics and Metaphysics. Here we will only focus on the law of noncontradiction.

4Many things in the world exist in relationship to one another. I, however, cannot both be my father’s father and my son’s father. That is a different relationship. Similarly, I may be the biological father of my son, but if my son were to be adopted by someone else, that would entail a different legal relationship.

5Another example of circular reasoning is Descartes’s statement, “I think, therefore I am”. Descartes presupposes an “I” and then concludes that an “I” exists. The conclusion is the premise of the argument and therefore, circular and invalid. Thankfully, Descartes later changed his statement to be understood as a self-evident first principle.

6This is true for any sound and valid argument whatsoever. The conclusion should never be a premise.

Works cited

Augustine. The Confessions, The City of God, On Christian Doctrine. Great Books of the Western World. Vol. 16. Encyclopedia Britannica, Inc., 1999.

Spinoza. Bacon, Descartes, Spinoza. Great Books of the Western World. Vol. 28. Encyclopedia Britannica, Inc., 1999.