How should we wage battle in the war on lies? As in everything, we must follow Jesus’s lead. First John 3:8 tells us, “The reason the Son of God appeared was to destroy the works of the devil.” Jesus came to destroy the work of the Devil, and the work of the Devil is spreading lies. Our part in this war is similar: we must labor to destroy the Devil’s work by resisting lies. That’s why our motto should be “Live not by lies.”

For the past decade, we’ve been living in what many scholars and cultural observers call the “post-truth” age.

The Oxford Dictionary—which named “post-truth” its word of the year in 2016—defines this term as “relating to or denoting circumstances in which objective facts are less influential in shaping public opinion than appeals to emotion and personal belief.”

While skepticism toward truth claims is nothing new, the past two decades have been distinguished by several factors that amplify the post-truth phenomenon. Social media’s rise has created echo chambers where misinformation can spread rapidly and unchecked. The decline in the influence of traditional information gatekeepers—such as established media outlets, universities, and religious institutions—has led to a fragmentation of shared narratives. And the increasing polarization of society has made many people more likely to accept information that confirms their existing beliefs, regardless of its factual basis.

This post-truth age poses profound challenges for Jesus followers. How does the church proclaim the gospel in a world where all truth claims are viewed with suspicion? How do we engage in meaningful dialogue when emotional resonance often trumps logical argument? And perhaps most critically, how do we maintain the integrity of our witness when the very concept of objective truth is under assault?

Truth, Lies, and the Devil

Before we can answer such questions about the post-truth world, we should first answer the question Pontius Pilate asked Jesus: “What is truth?” (John 18:38).

The best definition of truth, and one presupposed by Scripture, is that which corresponds to God’s reality. As philosopher J. P. Moreland explains, according to the correspondence theory of truth, “truth is a matter of a proposition (belief, thought, statement, representation) corresponding to reality.” Christians have a special relationship to truth since, as Scripture tells us, the ultimate reality—the most really real thing of all—is Jesus (John 14:6).

The opposite of truth is untruth or lies. When we say something is a lie, we mean it doesn’t correspond to reality. And if it doesn’t align with reality, it doesn’t align with the ultimate reality—Jesus. If it doesn’t correspond to reality, it’s in opposition to Jesus.

A lie is making an untrue statement or acting in such a way as to leave a false or misleading impression, especially with the intent to deceive someone who is deserving of the truth (and there are few situations where hearers are not deserving of truth [e.g., Josh. 2:4]). A lie is in opposition to the truth, and thus in opposition to Jesus. Post-truth is the phenomenon where public opinion is shaped more by unreality than reality, by lies rather than objective truth.

John Mark Comer notes that “the problem [today] is less that we tell lies and more that we live them; we let false narratives about reality into our bodies, and they wreak havoc in our souls.” In this post-truth world, we’re in the latest stage of what Comer calls the “war on lies.”

We’re both in a war on lies and with the one who started the war—the Devil. In John 8:44, Jesus says about the Devil, “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.”

The Devil has many things he can do, many ways he can harm humans, such as demonic possession and affliction. But his most powerful and effective tools are often more subtle. In 1836, John Wilkinson wrote, “One of the artifices of Satan is to induce men to believe that he does not exist.” A corollary for our age is that a primary artifice of the Devil is to induce men to act as if objective truth doesn’t exist.

The most effective means the Devil has of introducing evil into this world is to tell lies and encourage humans to spread them. That’s why there’s a war between truth and lies—and why everyone must choose a side. We either choose to side with reality and Jesus or we choose to side with Satan and lies.

If you side with Satan, you’ll be enslaved by lies. If you side with Jesus, then as John 8:32 tells us, “you will know the truth, and the truth will set you free.” Those are our only two options.

To be effective in this war on lies, we must know what we’re fighting against, have a strategy for engagement, and develop tactics to implement our strategy.

Four Fronts in the War

There are numerous battle lines within this war, but four are primary.

1. Emotional Untruth

As a manifestation of the post-truth phenomenon, this occurs when people prioritize their feelings, intuitions, or emotional responses over objective facts or empirical evidence. At its core, emotional untruth reflects the human tendency to trust our gut feelings and personal experiences more than abstract data or expert opinions. This can be particularly powerful when the emotional response is tied to deeply held beliefs, personal identities, or traumatic experiences.

Emotional responses aren’t inherently negative or irrational, as they can often serve as valuable intuitive guides, especially in individual social situations. However, problems arise when we allow our emotions to consistently override factual information, leading to decisions or beliefs disconnected from objective reality.

2. Narrative Untruth

This refers to the phenomenon where people accept or believe something because it fits into a compelling storyline or explanation, regardless of its factual accuracy. This type of post-truth thinking capitalizes on the human tendency to make sense of the world through stories. We are, by nature, storytelling creatures, and we often find it easier to understand and remember information when it’s presented in a narrative format.

Narrative untruth’s power lies in its ability to provide a sense of coherence and meaning to complex or chaotic events, to offer simple explanations for difficult problems, and to reinforce existing beliefs or worldviews.

This can be a particularly seductive type of lie because it often contains elements of factual truth interwoven with speculation, exaggeration, or outright falsehoods. This mixture can make it challenging to distinguish between fact and fiction, especially when the narrative aligns with one’s preexisting beliefs or desires.

Unsupported conspiracy theories are the most obvious type of narrative untruths. But an even more common form, especially on social media, is the oversimplified or distorted narrative of current events. These narratives take complex social, political, or religious issues and reduce them to simple, emotionally charged stories that often vilify one group while glorifying another.

For example, a complex debate about how to respond to a political issue might be reduced to a meme portraying one political faction as purely evil and the other as entirely virtuous. Or a nuanced social issue might be boiled down to a viral video that presents only one perspective, ignoring important context and alternative, biblically valid viewpoints.

These narratives spread rapidly through likes, shares, and comments, often reaching millions of people before fact-checkers or more balanced perspectives can catch up. The danger lies in their ability to shape public opinion and even influence real-world actions based on incomplete or distorted information.

3. Tribalistic Untruth

The philosopher Richard Rorty once claimed that “truth is what your contemporaries let you get away with saying.” He was suggesting truth is a social construct influenced by the norms, beliefs, and power structures of a given time and place. A corollary to this claim is “tribal truth”—that truth becomes what your tribe lets you get away with saying.

An individual’s “tribe” is the “in-group,” the group a person belongs to and feels a strong sense of identification with.

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