
'Unlocking the Divine: The Power of the Argument from Reason in Christian Faith'
Posted on 23 May 2026
The Argument from Reason
The argument from reason is an important philosophical concept that challenges the belief in naturalism, which asserts that everything can be explained solely through physical components. The argument contends that if naturalism is true, then human reason, which relies on the intellect to arrive at logical conclusions, cannot be trusted. This argument raises doubts about the reliability of our cognitive faculties and questions whether our ability to reason corresponds to truth.
Reason and Naturalism
Reason refers to the ability of the mind to infer and conclude in a logical manner. It allows us to come to genuine and accurate conclusions about the world. On the other hand, naturalism posits that reality is reducible to matter and energy alone, disregarding any transcendent or non-physical elements.
The argument from reason highlights the contradiction between naturalism and our confidence in human reason. If human reason is merely a product of mindless particle interactions, it cannot be relied upon to produce truthful beliefs. However, if we do believe that reason corresponds to truth, then it implies that reason is more than just a physical process. Therefore, naturalism would be false.
The Epistemological and Metaphysical Implications
The argument from reason primarily focuses on the epistemological question of how we know truth and how much we trust our ideas. However, it also carries metaphysical implications. If reason is objectively valid and real, it contradicts the notion that everything in the universe is random and purely physical. Why would humanity perceive reason as a non-material but real faculty if it did not exist? We distinguish between reason and irrationality, suggesting that reason has a distinct existence.
Prominent thinkers such as Victor Reppert, C.S. Lewis, G.K. Chesterton, and Thomas Nagel have contributed to various formulations of the argument from reason. While each argument has its strengths and weaknesses, they all emphasize the idea that if everything in the universe is random, our thoughts and conclusions would be equally unreliable. One need not adopt a biblical worldview to appreciate the logical force of this argument.
The Evolutionary Argument Against Naturalism
One notable version of the argument from reason is the evolutionary argument against naturalism (EAAN), popularized by Alvin Plantinga. Plantinga argues that if evolution is driven solely by survival of the fittest, beliefs that are advantageous for survival may not necessarily be true. Therefore, if naturalism is true, belief in naturalism itself is unjustified.
To illustrate this point, consider an extreme example: a man who develops a strong desire to be eaten by an invisible bear. This desire leads him to seek out locations without visible bears. Although this belief is factually false and irrational, it increases his chances of survival by keeping him away from real bears. This example demonstrates the distinction between beliefs that promote survival and those that correspond to truth. If human reason is solely a result of purposeless evolution, useful reasoning and truthful reasoning become separate categories, rendering all products of human reason untrustworthy.
Refutations and Limitations
Critics of the argument from reason often invoke the concept of emergence, which suggests that complex concepts can arise from simpler interactions. However, within a naturalistic framework, emergence ultimately rests on simple physics or matter and energy. If the process does not reduce to these components, it cannot be considered naturalistic.
It is important to note that debunking a specific version of the argument from reason does not prove naturalism. Demonstrating that a conclusion was arrived at illogically does not negate its truth value. The purpose of the argument from reason is to highlight the irreconcilable contradiction between believing in naturalism and trusting in human reason.
While the argument from reason does not directly address the existence or nature of God or the Bible, it serves as a valuable tool to demonstrate the logical inconsistencies inherent in rejecting God, as naturalists do. It points to the illogical and stubborn nature of those who reject the divine (Romans 1:18–25; Jude 1:10).
Why This Matters
The argument from reason is significant because it challenges the notion that naturalism is a more reasonable worldview than one that acknowledges transcendent ideas. It reveals the contradictions between relying on human reason and simultaneously embracing naturalism. By highlighting the limitations of purely physical explanations, this argument invites us to consider the deeper questions about the nature of reality and the existence of God.
Think About It
- How does the argument from reason challenge your understanding of naturalism and human reason?
- Can you think of any other examples that illustrate the distinction between beliefs that promote survival and those that correspond to truth?
- Reflect on the implications of the argument from reason for your own worldview. Does it raise any doubts or prompt further exploration?
