**Part of our series: Satan’s Lies—Common Deceptions in the Church Today**

Let’s start with an uncomfortable admission: much of what passes for “faith” in our culture really is wishful thinking.

The prosperity gospel that promises God will make us healthy and wealthy if we just believe hard enough? Wishful thinking. The sentimentalised faith that’s all comfort and no cross, all blessing and no obedience? Yes, that’s wishful thinking too.

So when Satan accuses Christians of believing fairy tales, he’s not entirely wrong—he’s just painting with too broad a brush. Satan’s lie isn’t that all faith is wishful thinking. His deception is subtler: he wants us to conclude that because some faith is counterfeit, all faith must be. But Scripture gives us clear, concrete ways to distinguish genuine, God-given faith from self-generated delusion. The question that should concern every believer is this: How can I know whether my faith is real?

THE UNCOMFORTABLE TRUTH WE MUST FACE

Jesus Himself warned not everyone who claims faith possesses genuine faith. “Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven,” he declared in Matthew 7:21-23. His parable of the soils describes people who “believe for a while” but fall away when tested. Even the demons, James reminds us, “believe—and shudder” (James 2:19). Clearly, not all belief qualifies as saving faith.

Scripture has always distinguished between temporary faith—which is emotional, self-serving, and ultimately false—and saving faith—which is wrought by the Spirit and perseveres to the end. This distinction matters desperately. If wishful thinking can masquerade as faith, we need biblical tests to examine ourselves. Paul himself commands this self-examination: “Test yourselves to see if you are in the faith” (2 Corinthians 13:5).

So how do we test? Scripture provides three diagnostic questions.

TEST ONE: WHAT IS MY FAITH’S OBJECT AND SOURCE?

Here’s the fundamental distinction: wishful thinking originates in us and focuses on our desires. Biblical faith originates with God and focuses on His revelation.

Paul is explicit: “Faith comes from hearing, and hearing through the word of Christ” (Romans 10:17). Genuine faith isn’t something we conjure up or manufacture—it’s God’s gift, wrought in us by his Spirit through his Word. Ephesians 2:8-9 could not be clearer: “By grace you have been saved through faith. And this is not your own doing; it is the gift of God, not a result of works.”

This gives us our first test: Is my faith shaped by God’s Word, or by my preferences? Do I believe what Scripture teaches even when it contradicts my natural inclinations? Or have I constructed a “faith” that conveniently endorses everything I already wanted to believe?

Wishful thinking tailors religion to suit our desires. It imagines a God who approves of our choices, who asks nothing difficult of us, who exists primarily to serve our happiness. Biblical faith, by contrast, submits to divine revelation even when that revelation is costly, uncomfortable, or counter-intuitive. The Reformed tradition has always emphasised true faith bows before Scripture’s authority rather than sitting in judgement over it.

Let’s ask ourselves honestly: If our faith disappeared tomorrow, what would we lose? If the answer is merely comfort or social belonging, we may be dealing with wishful thinking. If the answer is truth itself—the reality of God’s existence, Christ’s redemption, and our hope of eternal life—then we’re on firmer ground.

TEST TWO: DOES MY FAITH DEMAND EVIDENCE OR AVOID IT?

Contrary to popular caricature, biblical faith isn’t blind. Peter commands believers to “always be prepared to give a reason for the hope you have” (1 Peter 3:15). The Bereans were commended precisely because they examined the Scriptures daily to test Paul’s teaching (Acts 17:11). God himself invites, “Come now, let us reason together” (Isaiah 1:18).

Paul staked everything on the historical, verifiable resurrection of Jesus. He cited over 500 eyewitnesses who could confirm the event, and insisted that “if Christ has not been raised, our preaching is useless and so is your faith” (1 Corinthians 15:14). This isn’t wishful thinking—it’s an evidence-based claim about reality that can be investigated, questioned, and tested.

Reformed Christianity has consistently championed faith seeking understanding. Calvin argued in the Institutes that God has revealed himself both through creation (which displays his eternal power and divine nature) and through Scripture (which speaks with clarity and authority). Unlike wishful thinking, which fears scrutiny, genuine faith welcomes it because truth has nothing to fear from honest investigation.

Here’s our second diagnostic question: Are we afraid of hard questions about our faith? Do we avoid reading critics of Christianity or engaging with difficult biblical passages? Or are we confident truth-seeking ultimately confirms rather than undermines God’s Word?

Wishful thinking crumbles under examination. Biblical faith deepens.

TEST THREE: DOES MY FAITH TRANSFORM ME OR MERELY COMFORT ME?

This may be the most penetrating test. James is brutally direct: “Faith without works is dead” (James 2:26). Not absent, not weak—dead. Paul declares “if anyone is in Christ, he is a new creation” (2 Corinthians 5:17). John writes, “We know that we have passed from death to life because we love the brothers” (1 John 3:14).

Genuine, Spirit-wrought faith produces real transformation. Not perfection—Reformed theology is honest about indwelling sin that remains until glory. But genuine faith does produce progressive sanctification: growing holiness, increasing love, deeper submission to God’s will, and a life that increasingly bears the fruit of the Spirit.

Wishful thinking, by contrast, exists primarily to make us feel better. It’s a psychological comfort blanket, not a transforming power. It allows us to call ourselves Christians while living indistinguishably from unbelievers. It provides fire insurance against hell without requiring that we actually follow Christ.

So let’s examine ourselves: Has our faith made us more holy, more sacrificial, more loving? Does it cost us anything—our pride, our comfort, our preferred sins? Or does it function mainly as a source of pleasant feelings and social connection?

If our faith hasn’t changed how we live, it may not be faith at all.

UNDERSTANDING SATAN’S STRATEGY

Now we can see the enemy’s strategy in full. Satan doesn’t just want unbelievers to dismiss faith as wishful thinking—he wants believers to doubt whether their faith is genuine. It’s the same tactic from the Garden: “Did God really say?” By creating uncertainty about the authenticity of our faith, he paralyses our witness, undermines our assurance, and keeps us spiritually impotent.

But God hasn’t left us in the dark. Scripture provides these tests precisely so we can have confidence. Peter urges us to “be all the more diligent to confirm your calling and election” (2 Peter 1:10). This isn’t morbid introspection—it’s biblical wisdom.

THE ASSURANCE OF TRUE FAITH

Sure, much supposed faith is indeed wishful thinking. But that doesn’t mean all faith is. The Reformed tradition speaks of the “full assurance of faith” (Hebrews 10:22)—not arrogant presumption, but confident trust grounded in God’s promises and evidenced by the Spirit’s transforming work.

If we’ve examined our faith by these biblical tests—if it’s rooted in God’s Word rather than our wishes, if it welcomes truth rather than fears it, if it’s transforming us rather than merely comforting us—then we have solid ground for confidence. We’re not engaging in wishful thinking. We’re responding to the God who has made Himself known in creation, in Scripture, and supremely in His Son.

“I write these things to you who believe in the name of the Son of God, that you may know that you have eternal life” (1 John 5:13).

RELATED FAQs

What did Alvin Plantinga mean by saying Christian belief is “properly basic”? Reformed philosopher Alvin Plantinga argued belief in God can be rational even without arguments or evidence, much like our belief in other minds or the reality of the past. He distinguished between having evidence for a belief and a belief being warranted. And he demonstrated that Christian belief, when produced by God’s designed cognitive faculties operating properly, can have warrant even if the believer can’t articulate sophisticated arguments. This doesn’t mean faith is irrational or evidenceless; it means God has created us with the natural capacity to know Him, which sin has suppressed but grace restores.

• How do I respond when someone says “You only believe because you were raised Christian”? This commits the genetic fallacy—dismissing a belief based on its origins rather than its truth. Ask them: “Does that mean atheists raised by atheist parents only disbelieve because of their upbringing?” The origins of a belief don’t determine its truthfulness. Moreover, as CS Lewis noted, this argument is self-refuting: if all our beliefs are merely products of environment and psychology, that includes the sceptic’s belief that all beliefs are merely products of environment and psychology. The real question isn’t how we came to believe, but whether what we believe corresponds to reality.
• What’s the difference between saving faith and historical faith? The Westminster Confession distinguishes between types of faith: merely “historical” faith acknowledges biblical facts as true (like knowing George Washington was the first president), while saving faith involves personal trust and reliance on Christ. James 2:19 captures this: demons have accurate theology—they know God exists and Jesus is Lord—but they don’t trust him for salvation. Saving faith includes knowledge (notitia) and assent (assensus), but it’s completed by trust (fiducia)—actually resting our eternal weight on Christ’s finished work rather than just acknowledging it happened.

How does one respond to Freud’s claim that religion is wish-fulfillment? Freud argued belief in God is a projection of our desire for a cosmic father figure. But as apologist Tim Keller pointed out, this argument cuts both ways: couldn’t atheism be wish-fulfillment for those who want no moral authority over them? More importantly, the argument confuses motive with truth. Even if we desire God to exist (which Romans 1 suggests we actually suppress, not project), that doesn’t mean He doesn’t exist. By Freud’s logic, our desire for food would prove food is imaginary—but our hunger actually points to food’s reality.

• Can I have true faith and still struggle with doubts? Absolutely. Reformed theology distinguishes between the weakness of faith and the absence of faith. The man in Mark 9:24 cried out, “I believe; help my unbelief!”—and Jesus honoured that struggling faith. Doubt isn’t the opposite of faith; unbelief is. As John Piper explains, faith isn’t the absence of questions but the presence of trust despite questions. What matters isn’t the strength of our faith but the object of our faith—even weak faith in a strong Saviour saves, while strong faith in a false god damns.
• How do presuppositional apologists like Van Til approach this question? Cornelius Van Til argued the debate between belief and unbelief is ultimately about competing presuppositions, not neutral evaluation of evidence. He contended unbelief itself requires “faith”—faith in human reason’s autonomy, faith in the uniformity of nature, faith that truth can exist in a materialistic universe. Van Til would say the question isn’t whether we’ll have faith, but whether our faith will rest on the self-authenticating God of Scripture or on idols. His approach reveals that skeptics borrow from the Christian worldview (logic, morality, meaning) while denying its foundation—making their position the truly irrational one.

What role does the Holy Spirit play in distinguishing true faith from wishful thinking? The Westminster Confession teaches the Holy Spirit bears “witness by and with the Word in our hearts” (I.5), providing an internal testimony that Scripture is God’s Word and that we are God’s children. Romans 8:16 says “The Spirit himself bears witness with our spirit that we are children of God.” This isn’t subjective emotionalism—it’s God’s own confirmation working through the objective truth of Scripture. As Jonathan Edwards explained, the Spirit doesn’t give us new revelation beyond Scripture, but opens our eyes to see the divine beauty and authority already there. This divine testimony distinguishes true, Spirit-wrought faith from self-generated religious feelings.

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