DEFEND THE FAITH

Pillar I: Foundations

Lesson I — What Is Truth?

A Necessary Beginning

Before a belief can be defended, it must be defined.
Before a claim can be evaluated, the standard by which it is judged must be known.
And before faith can be meaningfully discussed, the question of truth must be settled.

This is not a theological luxury. It is a logical necessity.

We live in a time where the word truth is used constantly and understood rarely. It is invoked in moral debates, personal testimonies, political rhetoric, and religious claims — yet the moment someone asks what truth actually is, conversation quickly dissolves into feeling, preference, or power.

That dissolution is not accidental.

If truth is unclear, everything downstream becomes negotiable: morality, justice, identity, even God Himself. For this reason, any serious attempt to defend the Christian faith must begin here — not with arguments about Scripture, miracles, or doctrine, but with a far more basic question:

What is truth, and how do we know when we have it?

How the Word “Truth” Is Commonly Used

Before we define truth properly, we must first understand how it is currently used — and misused. Most confusion does not come from outright denial, but from redefinition. The same word is spoken, but it no longer carries the same meaning.

Truth as Personal Experience

Perhaps the most common modern usage treats truth as something internal — something discovered by introspection rather than observation.

You hear this language often:

• “That may be true for you.”

• “I’m just speaking my truth.”

• “This feels true to me.”

In this framework, truth is reduced to sincerity. If a belief is held honestly and felt deeply, it is treated as valid — not because it corresponds to reality, but because it reflects the individual’s experience.

At first glance, this sounds compassionate. It appears to honor diversity and avoid arrogance. But upon closer inspection, it collapses under its own weight.

If truth is determined by personal experience, then contradiction becomes impossible to resolve. Two people can hold mutually exclusive beliefs — not merely opinions, but claims about reality — and both are said to be “true.” The word loses all discriminatory power. It no longer separates what is from what is not; it merely catalogs feelings.

This is not humility. It is abdication.

Truth as Consensus

Another popular definition treats truth as whatever a group agrees upon. In this view, truth is socially constructed. It evolves as cultures change, knowledge expands, or values shift.

This approach often presents itself as enlightened and progressive. After all, societies do learn over time. But learning is not the same as creating truth.

If consensus defines truth, then truth is held hostage to majority opinion. History quickly exposes the danger of this idea. Entire civilizations have collectively agreed upon slavery, child sacrifice, eugenics, and genocide. Agreement did not make these things true or right — it merely made them popular.

Consensus can tell us what people believe.
It cannot tell us whether those beliefs correspond to reality.

Truth as Skepticism

A third posture pretends to reject truth altogether. This view claims that certainty is impossible, objectivity is an illusion, and all claims are ultimately subjective.

This position often masquerades as intellectual humility. It sounds cautious, nuanced, even wise. But it commits a fatal error: it asserts as true the claim that truth cannot be known.

That is not humility — it is self-contradiction.

If no truth can be known, then that statement itself cannot be known to be true. Skepticism does not escape truth claims; it merely smuggles them in under a different name.

Why These Definitions Fail (Common Sense Considerations)

Before appealing to Scripture, we should pause and ask whether these definitions survive contact with ordinary life.

Consider a courtroom. If truth is merely personal experience, then a defendant’s sincerity would outweigh evidence. If truth is consensus, then a jury could redefine reality by agreement. If truth is unknowable, then justice becomes impossible.

Or consider medicine. A patient may sincerely believe they are healthy. A community may collectively deny the presence of disease. A skeptic may question whether diagnosis is ever certain. None of these change the biological facts of the body.

In each case, reality remains what it is, regardless of belief, agreement, or doubt.

This reveals a basic principle we intuitively live by even when we deny it philosophically:

Truth must correspond to reality, or it is not truth at all.

How Scripture Speaks of Truth

When Scripture uses the word truth, it does not speak of it as a feeling, a consensus, or a probability. It speaks of truth as something objective, discoverable, and binding.

Truth is not invented by humanity; it is revealed.
Truth is not internal to us; it stands over us.
Truth does not change when we resist it.

This is why Scripture repeatedly connects truth to:

• God’s nature

• God’s word

• God’s acts in history

Truth, in the biblical sense, is that which aligns with God’s character and the reality He has created. It is not merely correct information; it is faithful reality — what is, as God knows it to be.

This is why Jesus does not say He teaches the truth as one option among many. He says:

“I am the way, and the truth, and the life.”

This is not poetic exaggeration. It is a claim about authority and ontology. Truth is not merely something Christ speaks; it is something He is.

What Breaks When Truth Is Redefined

Once truth is untethered from reality and God, the consequences ripple outward.

Justice Loses Meaning

If truth is flexible, then guilt and innocence are negotiable. Justice becomes preference disguised as principle.

Love Becomes Sentiment

If truth no longer constrains love, then love is reduced to affirmation. Correction becomes cruelty. Faithfulness becomes intolerance.

Faith Becomes Fantasy

If truth is subjective, then belief no longer submits to reality — it escapes from it. Faith is no longer trust in what is true; it is confidence in what is desired.

Authority Becomes Oppression

If no higher truth exists, then authority cannot appeal to anything beyond itself. Power replaces legitimacy.

This is why redefining truth is never neutral. It always reshapes the moral landscape.

A Plain-Sense Anchor

Here is a guardrail worth returning to:

Truth is not created by belief; belief is meant to conform to truth.

We live this way instinctively in every serious area of life — law, science, engineering, medicine. The moment we exempt theology from this standard, we do not elevate faith; we evacuate it of meaning.

Scripture as Confirmation

Scripture does not introduce truth as a novelty. It affirms what reason already reveals: that truth is real, objective, and authoritative.

“Sanctify them in the truth; your word is truth.”

Notice the order. God’s word is not declared true because we accept it. It is accepted because it is true.

Where This Leaves Us

If truth exists, then it can be known.
If it can be known, then it can be defended.
And if it can be defended, then belief becomes an act of obedience rather than invention.

This is why defining truth is not an academic exercise. It is the foundation upon which every other claim must stand or fall.

In the next lesson, we must confront the unavoidable follow-up question:

If truth exists, who has the authority to define it?

That question cannot be avoided forever. It only waits.

Scriptural References: 

• John 14:6

• John 17:17

• Psalm 119:160

• Proverbs 30:5

• Isaiah 45:19

• 2 Samuel 7:28

• Titus 1:2

• Hebrews 6:18

• 1 John 5:20

• Ephesians 4:21