What Is the Definition of Biblical Truth?
Truth is one of those words that gets tossed around a lot. People talk about their truth, your truth, my truth, and every version in between. But here’s the problem—truth isn’t personal, relative, or changing. Truth is fixed. It is absolute. And if you’re a believer, you know that truth is found in God alone.
So, let’s get to the heart of it. What is the definition of biblical truth? How do we define it, and why does it matter in a world where deception runs rampant?
God Is Truth and the Source of All Truth
If you want to understand the definition of biblical truth, you have to start with its source: God Himself.
Numbers 23:19 makes that clear:
“God is not man, that he should lie, or a son of man, that he should change his mind. Has he said, and will he not do it? Or has he spoken, and will he not fulfill it?”
God does not lie. He doesn’t change His mind. His truth is unshakable. If God says it, it’s true. Period. And that’s a big deal, because we live in a world where lies are normal, deception is expected, and truth is often inconvenient.
The Bible goes even further in Titus 1:2:
“In hope of eternal life, which God, who never lies, promised before the ages began.”
Let that sink in—God never lies. Ever. Not once. Not even a little. When God speaks, it is truth. And when He makes a promise, it is as good as done.
Jesus Is the Embodiment of Truth
Now, this is where it gets personal. Truth isn’t just a concept—it’s a person.
In John 14:6, Jesus says something radical:
“I am the way, and the truth, and the life. No one comes to the Father except through me.”
He didn’t say, I speak the truth, or I believe in truth. No—He is the truth. The truth of God is fully revealed in Jesus Christ.
When you follow Jesus, you follow the truth. When you reject Jesus, you reject the truth. There’s no in-between. No compromise. No alternative options. That’s why the world hates the definition of biblical truth—because it forces people to confront Jesus, and they don’t want to deal with that.
The Word of God and the Definition of Biblical Truth
Since truth comes from God and is revealed in Christ, it only makes sense that His Word is also truth.
John 17:17 says:
“Sanctify them in the truth; your word is truth.”
Not your word contains truth—your word IS truth. That’s a massive distinction. The Bible isn’t just a collection of wise sayings, spiritual reflections, or good advice. It is the unchanging, God-breathed truth that exposes lies, convicts hearts, and reveals God’s will.
Psalm 119:160 confirms this:
“The sum of your word is truth, and every one of your righteous rules endures forever.”
The sum of God’s Word is truth. All of it. Every word. Every passage. Every command.
And in case anyone wants to argue that biblical truth has evolved, Isaiah 40:8 shuts that down real quick:
“The grass withers, the flower fades, but the word of our God will stand forever.”
The Holy Spirit Guides Believers into Truth
Truth isn’t just something we learn—it’s something we are led into. That’s the work of the Holy Spirit.
John 16:13 tells us:
“When the Spirit of truth comes, he will guide you into all the truth, for he will not speak on his own authority, but whatever he hears he will speak, and he will declare to you the things that are to come.”
Did you catch that? The Spirit of truth. He doesn’t just help us understand truth; He guides us into it.
That means:
- If you belong to Christ, you don’t have to wander around confused.
- You don’t have to be deceived by the lies of this world.
- You don’t have to “figure it out” on your own.
The Holy Spirit will lead you to the definition of biblical truth—if you’re willing to listen.
The World Rejects Truth and Embraces Lies
If the definition of biblical truth is so clear, why is the world so confused? Because most people reject it outright. They aren’t merely indifferent to truth—they are actively opposed to it. Instead of submitting to the authority of God, they redefine reality to fit their own desires. They trade truth for lies, convincing themselves that deception is better because it allows them to live how they want without accountability.
Romans 1:25 lays it out plainly:
“They exchanged the truth about God for a lie and worshiped and served the creature rather than the Creator, who is blessed forever! Amen.”
That’s the heart of the problem. People don’t just “miss” the definition of biblical truth—they deliberately exchange it for a counterfeit version. They reject God as the ultimate authority and instead place themselves, their emotions, or their ideologies in His place. And once truth is replaced with self-made morality, every kind of sin and deception follows.
A World That Calls Evil Good and Good Evil
This rejection of truth isn’t just a passive decision—it’s an active rebellion. Isaiah 5:20 warns against this very thing:
“Woe to those who call evil good and good evil, who put darkness for light and light for darkness, who put bitter for sweet and sweet for bitter!”
This is exactly what we see today. People not only reject the definition of biblical truth, but they also work tirelessly to reverse it. Sin is celebrated. Righteousness is condemned. What was once shameful is now considered honorable, and what was once good is now offensive.
And when people reject the truth long enough, something even more dangerous happens. Deception takes over.
2 Thessalonians 2:10-12 warns about this:
“They refused to love the truth and so be saved. Therefore God sends them a strong delusion, so that they may believe what is false, in order that all may be condemned who did not believe the truth but had pleasure in unrighteousness.”
This passage should make us stop and think. God does not force people to believe lies, but He does allow those who reject the truth to be swept away by deception. This is part of His judgment—a terrifying reality where those who insist on rejecting the truth will eventually lose the ability to see it altogether.
The Tragic Consequence of Rejecting Truth
The danger of rejecting the truth isn’t just that people believe lies—it’s that they become hardened to the truth entirely. Ephesians 4:18 describes this condition:
“They are darkened in their understanding, alienated from the life of God because of the ignorance that is in them, due to their hardness of heart.”
Truth is not something you can reject without consequence. A hardened heart does not happen overnight—it happens over time, as a person continually refuses to submit to God’s Word. At some point, their ability to hear, see, and receive truth diminishes entirely.
This is why the world becomes increasingly hostile toward Christianity. The more people reject the definition of biblical truth, the more they despise those who stand for it. John 3:19 makes it clear:
“And this is the judgment: the light has come into the world, and people loved the darkness rather than the light because their works were evil.”
The world doesn’t just reject truth—it hates it, because truth exposes sin. And for those who love their sin, that exposure is unbearable.
Final Thoughts on the World’s Rejection of Truth
When people abandon truth, they don’t become neutral—they become enslaved to lies. Without truth, there is no moral anchor, no objective standard, and no safeguard against deception. And when that happens, evil flourishes.
The rejection of truth is never just intellectual—it is spiritual. It is a battle for the soul.
That’s why, as believers, we must stand firm in the definition of biblical truth, even when it costs us. The world may reject it, but we know that God’s truth will never fail.
Psalm 119:160 declares:
“The sum of your word is truth, and every one of your righteous rules endures forever.”
No matter how much the world tries to erase, distort, or redefine it—truth remains.
Satan Is the Father of Lies
At the root of every falsehood, distortion, and deception is the father of lies himself—Satan.
Jesus makes it clear in John 8:44:
“You are of your father the devil, and your will is to do your father’s desires. He was a murderer from the beginning, and does not stand in the truth, because there is no truth in him. When he lies, he speaks out of his own character, for he is a liar and the father of lies.”
Satan has one agenda—to deceive and destroy. He doesn’t just speak lies—he is the source of all lies. That’s why the world is in the state it’s in. People would rather believe a beautiful lie than an uncomfortable truth.
Living According to Biblical Truth
So, what do we do with this? How do we walk in biblical truth when the world is drowning in deception?
- Know the Truth—Study God’s Word.
- Psalm 119:105: “Your word is a lamp to my feet and a light to my path.”
- Be Led by the Holy Spirit.
- John 16:13: “He will guide you into all the truth.”
- Reject the Lies of the World.
- Colossians 2:8: “See to it that no one takes you captive by philosophy and empty deceit.”
- Live Out the Truth Daily.
- James 1:22: “But be doers of the word, and not hearers only, deceiving yourselves.”
- Stand Firm, Even When It’s Unpopular.
- 2 Timothy 3:12: “Indeed, all who desire to live a godly life in Christ Jesus will be persecuted.”
The Unshakable Nature of Biblical Truth
Truth isn’t subjective. It isn’t flexible. It isn’t up for debate. The definition of biblical truth is found in God, revealed in Christ, written in Scripture, and confirmed by the Holy Spirit.
So the real question isn’t “What is truth?”—it’s “Are you walking in it?”
Jesus said in John 8:32:
“You will know the truth, and the truth will set you free.”
If you’ve been chasing the world’s version of truth, it’s time to stop running and start trusting in the One who never lies.
Blessings in Christ Jesus,
Wally
PS: Do you have questions? Let’s talk. Feel free to reach out.
Would you like to know more about the biblical doctrine of election? Here’s my free pamphlet on Chosen by Grace.
Walt Roderick is a Christian writer who cares more about biblical clarity than online applause. He writes to strengthen believers and confront spiritual drift.
