Introduction
In a world filled with confusion and contradiction, logic is one of the most powerful tools God has given us to discern truth from error. As believers, understanding and applying logic is essential—not only in our daily decision-making but also in defending the truth of the Gospel. This post will introduce the basics of logic, explain its foundational laws, and explore its divine origin.
What Is Logic?
Logic is the study of reasoning and argumentation. It helps us determine whether our thinking is consistent and whether our conclusions follow reasonably from our starting points. Simply put, logic is about how we think—and how we can know if we’re thinking correctly.
In the Christian worldview, logic is not a human invention. It reflects the orderly and rational nature of God Himself. The laws of logic are universal, immaterial, and unchanging—just like God.
The Three Basic Laws of Logic
- The Law of Identity
A is A.
This law states that something is what it is. A thing is identical to itself. For example, a tree is a tree. This may sound obvious, but it’s foundational to all clear thinking. If we don’t accept that things are what they are, communication and understanding become impossible. - The Law of Non-Contradiction
A cannot be both A and not-A at the same time and in the same way.
This law tells us that contradictory statements cannot both be true. For example, Jesus cannot both be the Son of God and not be the Son of God. This is essential for maintaining the integrity of truth. - The Law of the Excluded Middle
Either A or not-A.
This law means that for any statement, either that statement is true, or its negation is true—there is no middle ground. For example, “God exists” is either true or false. There’s no third option.
Why Logic Matters for Christians
God is a God of order, not confusion (1 Corinthians 14:33). The very structure of reality reflects His nature, and that includes the laws of logic. When we think logically, we are, in a sense, thinking God’s thoughts after Him.
Jesus Himself used logic throughout His earthly ministry—asking probing questions, revealing contradictions in His opponents’ reasoning, and clarifying truth through parables and syllogisms. As His followers, we should strive to do the same.
In an age when many challenge the Christian faith, believers must be prepared to give a reasoned defense (1 Peter 3:15). Logic equips us to do this well. It helps us identify false arguments, strengthen our witness, and articulate the truth of the Gospel with clarity and conviction.
Conclusion
Logic is not merely an academic subject—it is a gift from God. By learning and applying the basic laws of logic, we honor the Creator of reason and prepare ourselves to better defend the faith. Let us commit to growing in both faith and reason, knowing that both come from the same divine source.
“Come now, let us reason together, says the Lord…” – Isaiah 1:18 (ESV)
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