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Necessary Truth

How The Existence Of Logic Points Back To God

By Peter Thwing - Host of the FST PodcastPublished 2 months ago 6 min read
Necessary Truth
Photo by Alex Shute on Unsplash

The Foundation Of All Thinking

Every human act of reason begins with an assumption. The assumption is that logic exists. When we say something is true or false, when we draw conclusions or recognize contradictions, we rely on fixed laws of thought that we did not invent. These laws are universal, consistent, and independent of personal opinion.

We trust logic every time we speak, argue, or even doubt. To deny logic is to use logic in the act of denial. It is self-defeating by nature. This is why reasoning itself is proof that truth is not relative. There must be something that makes rational thought possible.

The question is not whether logic exists, but why it exists at all.

The Nature Of Necessary Truth

Logic is not a product of the physical world. It cannot be measured, weighed, or observed under a microscope. Yet its effects are everywhere. It governs mathematics, science, morality, and language.

A necessary truth is something that could not possibly be false. Two plus two cannot equal five. A thing cannot be and not be in the same sense at the same time. These laws are true in every possible universe. They are not created; they are discovered.

If logic is necessary, then it must have a necessary source. The finite cannot produce the infinite. Contingent beings cannot produce what is absolute.

The Problem Of Infinite Regress

If every explanation depends on another, you never arrive at a foundation. It is like a chain hanging from the sky with no anchor. Something must exist that does not depend on anything else. Otherwise, nothing could exist at all.

Logic exposes this clearly. If there were no uncaused, self-existent source of order, reason itself would collapse. Every argument would rely on something arbitrary, and truth would be a matter of preference.

The necessity of logic requires a necessary being. The chain of reasoning must end somewhere, and it ends in the mind of God.

The Divine Source Of Logic

God is not logical because logic exists. Logic exists because God is. His nature is truth, order, and consistency. The laws of logic are not rules He follows but reflections of who He is.

The Apostle John wrote, “In the beginning was the Word.” The Greek word used there is Logos, meaning “reason,” “logic,” or “divine order.” It does not say the Word was created. It says the Word was with God, and the Word was God. Logic and God are not separate realities. Logic is the expression of God’s eternal nature.

When we reason correctly, we think God’s thoughts after Him.

The Illusion Of Neutrality

Many claim to use logic as a neutral tool, free from belief in God. Yet logic cannot be neutral. It presupposes order, and order presupposes a mind or being, one who organizes everything with order. To speak of “laws of thought” without acknowledging the Lawgiver is to borrow from the very worldview one denies.

Atheism can mimic logic, but it cannot justify it. If the universe is purely material, then thoughts are chemical reactions. Yet chemical reactions have no concern for truth. They simply occur. If every belief is the product of brain chemistry, there is no reason to trust any belief, including the belief that God does not exist.

The very act of trusting logic assumes a rational origin.

The Necessity Of A Rational Mind

Logic is not a thing that exists by accident. It is a system of relationships that require intelligence to be understood or even recognized. Order cannot arise from chaos. Meaning cannot arise from meaninglessness. If logic exists, there must be a mind that contains and expresses it.

That mind must be eternal, because logic is eternal. It must be unchanging, because logic is unchanging. It must be self-existent, because logic cannot depend on anything less than itself. These attributes belong only to God.

To affirm logic while denying God is to affirm structure while denying the foundation that supports it.

The Contradiction Of Materialism

Materialism claims that the universe is all there is, and that everything can be explained through matter and motion. Yet logic itself is not material. It cannot be touched, seen, or confined to a brain. If logic is real, then reality includes more than matter.

Furthermore, materialism depends on the reliability of the human mind. But if the mind is nothing more than the product of unguided evolution, aimed at survival rather than truth, then its conclusions are suspect. Why trust reasoning that evolved merely to help a species survive, not to discover ultimate reality?

C.S. Lewis pointed this out when he wrote that if our reasoning is the accidental byproduct of irrational causes, then we have no reason to trust reasoning itself. Logic refutes materialism by its own existence.

The Moral Implications Of Necessary Truth

The existence of logic also implies the existence of objective morality. Both are expressions of order and consistency. Moral laws, like logical laws, point to a moral lawgiver.

If there is no God, then right and wrong are human inventions. They change with culture, emotion, and power. Yet every person knows instinctively that some things are always wrong. We do not simply dislike murder or deceit; we know they are evil.

That knowledge reflects the same universal order that logic reveals. Truth and morality share the same source. They are both rooted in the unchanging nature of God.

The Beauty Of Coherence

Truth is beautiful because it fits together. The universe operates according to patterns and laws. Mathematics, physics, and language all mirror one another in their precision. This unity of structure points to a single Designer.

Chaos does not create harmony. Randomness does not produce law. The coherence of reality testifies to an intelligent cause. That cause must be rational, purposeful, and self-existent. It must be the foundation of both thought and being.

To recognize this is not blind faith. It is the only logical conclusion.

The Futility Of Denial

Every attempt to use logic against God collapses under its own weight. To argue that God does not exist, one must rely on logic. But logic itself depends on God. It is like sawing off the branch you are sitting on. The more you cut, the less ground you have left.

The atheist may claim that logic is simply a description of how the universe behaves. Yet that claim assumes the universe behaves rationally, and rational behavior requires a rational cause. Denying God while using His order to justify your denial is not reason; it is rebellion disguised as intellect.

The denial of God does not erase Him. It only blinds the denier to the very evidence that sustains their ability to deny.

The Peace Of Consistency

Belief in God unites the mind and the heart. It restores coherence between thought, morality, and meaning. It gives a foundation that cannot be shaken by the trends of culture or the doubts of skeptics.

A believer does not fear truth. Truth belongs to God. Every discovery, every question, every act of honest reasoning draws us closer to the One who is truth itself. Faith and logic are not enemies. They are companions, walking hand in hand toward the same destination.

The person who believes that God is the source of logic does not need to fear contradiction. Reality will always confirm what God has revealed.

The Final Word

Logic is not a human achievement. It is a divine inheritance. It existed before humanity, before time, and before the physical universe. It reflects the eternal order of a perfect mind.

To reason is to participate in that order. To reject it is to deny the very possibility of reason. The existence of logic is the fingerprint of God on the fabric of creation. Every equation, every law of thought, and every consistent truth whispers His name.

The atheist may mock, the skeptic may doubt, and the cynic may scoff. Yet none can escape the logic that sustains their disbelief. Every sentence they form, every argument they make, every appeal to reason they attempt is built upon the same foundation they refuse to acknowledge.

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God is not proven by logic alone. He is revealed through it.

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About the Creator

Peter Thwing - Host of the FST Podcast

Peter unites intellect, wisdom, curiosity, and empathy —

Writing at the crossroads of faith, philosophy, and freedom —

Confronting confusion with clarity —

Guiding readers toward courage, conviction, and renewal —

With love, grace, and truth.

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