What does it mean that Scripture is “infallible”?
Question 1000
Let’s start where we always should – with what Scripture says about itself. When Jesus was being tempted by Satan in the wilderness, He responded with a statement that gets right to the heart of this matter: “Man shall not live by bread alone, but by every word that comes from the mouth of God” (Matthew 4:4). Notice that – every word. Not most words. Not the general idea. Every word that proceeds from God’s mouth is life-giving and trustworthy.
When we talk about Scripture being infallible, we’re saying it cannot fail or deceive. It’s incapable of error in what it teaches. Inerrancy, while related, makes a slightly different claim – Scripture contains no errors in what it affirms, whether in theology, history, geography, or science. Both concepts are biblical, both are important, and both flow from the nature of Scripture as God’s Word.
Biblical Foundation
Jesus made a crucial statement in John 10:35 when He said “Scripture cannot be broken.” The Greek word here is λύω (luo), which means to loose, destroy, or dissolve. What Jesus is declaring is that Scripture cannot be undone, cannot fail in its purpose, cannot be shown to be unreliable. It stands firm. It accomplishes what God intends. This is the heart of what we mean by infallibility.
Paul tells Timothy that “all Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness, that the man of God may be complete, equipped for every good work” (2 Timothy 3:16-17). The term θεόπνευστος (theopneustos) – literally “God-breathed” – tells us about the origin of Scripture. It comes from God Himself. And if it comes from God, it shares His character. God cannot lie (Titus 1:2, Hebrews 6:18), God cannot fail (Isaiah 55:11), and therefore His Word cannot lie or fail either.
Peter reinforces this: “no prophecy of Scripture comes from someone’s own interpretation. For no prophecy was ever produced by the will of man, but men spoke from God as they were carried along by the Holy Spirit” (2 Peter 1:20-21). The picture here is of a ship being carried along by the wind – the human authors weren’t left to their own devices, but were borne along by the Spirit of God. The result is a book that bears both the marks of human personality and divine authorship, yet is entirely reliable because God superintended the entire process.
Understanding the Terms
When we talk about Scripture being infallible, we’re saying it cannot fail or deceive. It’s incapable of error in what it teaches. The word “infallible” comes from the Latin in- (not) and fallere (to deceive or fail). So an infallible Scripture is one that will not mislead you, will not fail in its purpose, and can be utterly trusted to guide you to truth and salvation.
Inerrancy, while related, makes a slightly different claim. When we say Scripture is inerrant, we’re saying it contains no errors in what it affirms – whether that’s in matters of theology, history, geography, or science. It speaks truthfully about everything it addresses. The focus here is on accuracy and precision in every detail.
Think about it practically. Infallibility answers the question: “Can I trust the Bible to guide me safely to God and truth?” The answer is an absolute yes. Inerrancy answers the question: “Is everything the Bible affirms actually true?” Again, yes.
Both concepts are biblical, but they emphasise different aspects of Scripture’s trustworthiness. Infallibility tends to focus on Scripture’s purpose and effectiveness – it will not fail to accomplish what God intends. Inerrancy focuses on Scripture’s content – every assertion it makes is true.
Historical Development
These terms haven’t always been used in exactly the same way throughout church history, which sometimes causes confusion. The early church fathers spoke more naturally about Scripture’s infallibility – its complete trustworthiness and reliability as our guide. They knew they could stake their lives on it because it came from God.
The term “inerrancy” became more prominent during the modernist controversies of the 19th and early 20th centuries when liberal scholars began questioning whether the Bible contained errors, particularly in historical and scientific matters. Conservative scholars responded by carefully defining what they meant by saying Scripture is without error. The Chicago Statement on Biblical Inerrancy (1978) provided one of the most thorough explanations of this doctrine.
Some Christians prefer the term “infallibility” because they feel it emphasises what really matters – Scripture’s reliability for faith and practice. Others prefer “inerrancy” because they believe we must affirm that everything Scripture teaches is true, not just the “religious” parts. But here’s the thing – we don’t need to choose between them. Both are true. Both are important. Both flow from the nature of Scripture as God’s Word.
Biblical Warrant for Both Concepts
Let’s look at how Scripture itself speaks to both these ideas. Psalm 19:7 says, “The law of the LORD is perfect, reviving the soul; the testimony of the LORD is sure, making wise the simple.” That word “perfect” is תָּמִים (tamim) in Hebrew – complete, whole, without defect. That speaks to inerrancy. The word “sure” is נֶאֱמָן (ne’eman) – faithful, reliable, trustworthy. That speaks to infallibility.
Psalm 119 is absolutely packed with statements about God’s Word. Verse 89: “Forever, O LORD, your word is firmly fixed in the heavens.” Verse 160: “The sum of your word is truth, and every one of your righteous rules endures forever.” The psalmist isn’t making a distinction between religious truth and other kinds of truth – it’s all truth, all reliable, all enduring.
Proverbs 30:5-6 warns us: “Every word of God proves true; he is a shield to those who take refuge in him. Do not add to his words, lest he rebuke you and you be found a liar.” Every word. Not most words. Not just the theological words. Every word proves true and can be trusted completely.
Jesus’ statement in Matthew 5:18 is remarkable: “until heaven and earth pass away, not an iota, not a dot, will pass from the Law until all is accomplished.” The iota (ἰῶτα) is the smallest letter in the Hebrew alphabet, like our letter ‘i’. The dot or stroke (κεραία, keraia) refers to the tiny marks that distinguish similar Hebrew letters. Jesus is saying that down to the smallest detail, Scripture will be fulfilled and proven true. That’s inerrancy at the micro level.
Why Both Matter
Some people ask, “Why does it matter if the Bible has minor errors in geography or history, as long as it’s reliable about spiritual truth?” That question sounds reasonable at first, but it creates a massive problem. Who decides which parts are reliable and which aren’t? Once you grant that Scripture contains errors in what it affirms, you’ve undermined confidence in all of it. If Moses got the geography wrong, maybe he got the theology wrong too. If Luke made mistakes in his historical details, maybe he fabricated the resurrection. You can see where this leads.
Jesus treated every part of Scripture as completely reliable. He based arguments on a single word (Matthew 22:32), on verb tenses (Matthew 22:32), and on details that sceptics might dismiss as unimportant. When Jesus says “Scripture cannot be broken,” He’s not adding a qualifier like “except for the bits about history or science.” He means all of it.
The infallibility of Scripture assures us that God’s Word will accomplish its purpose in our lives. Isaiah 55:10-11 promises: “For as the rain and the snow come down from heaven and do not return there but water the earth, making it bring forth and sprout… so shall my word be that goes out from my mouth; it shall not return to me empty, but it shall accomplish that which I purpose, and shall succeed in the thing for which I sent it.” That’s infallibility – God’s Word cannot fail.
The inerrancy of Scripture assures us that we can trust every detail, not just the broad strokes. When Scripture tells us Jesus was born in Bethlehem, we don’t have to wonder if maybe it was actually Nazareth and the Gospel writers got confused. When it tells us specific numbers, dates, or historical details, we can trust them. When it makes statements about the natural world, they’re reliable. This doesn’t mean Scripture is written as a modern science textbook, but when it speaks about the natural world, it speaks truly.
Practical Implications
What does this mean for how we read and apply Scripture? Everything, actually. If Scripture is both infallible and inerrant, then we can approach it with complete confidence. We don’t need to sit in judgement on Scripture, deciding which bits sound plausible and which don’t. Instead, we submit ourselves to its authority.
When Scripture says something that contradicts our modern assumptions – about creation, about the global flood, about miracles, about judgement, about sexuality, about gender, about marriage – we trust Scripture over culture. We don’t try to reinterpret difficult passages to make them more palatable. We don’t explain away the supernatural elements. We take God at His word.
This doctrine also protects us from false teaching. If someone comes along with a novel interpretation that contradicts what Scripture has clearly taught throughout church history, we can test their claims against the infallible, inerrant Word of God. We’re not tossed about by every wind of doctrine (Ephesians 4:14) because we’re anchored to something absolutely reliable.
At the same time, affirming Scripture’s infallibility and inerrancy doesn’t mean we claim to have infallible interpretation. We’re fallible interpreters of an infallible text. We need humility, careful study, and willingness to test our understanding. But we can have confidence that as we study Scripture and allow Scripture to interpret Scripture, the Spirit will guide us into all truth (John 16:13).
Conclusion
Here’s what it comes down to: Christianity stands or falls on whether we can trust the Bible completely. If Scripture is merely a human book containing God’s thoughts mixed with human error, we’re left picking and choosing what to believe. But if Scripture is God’s infallible, inerrant Word – and it is – then we have a sure foundation.
Paul writes that faith comes by hearing, and hearing by the word of God (Romans 10:17). But what if that word contains errors? Then faith becomes uncertain. What if Scripture’s promises might be mistaken? Then hope becomes shaky. What if Scripture’s commands might be human invention? Then obedience becomes optional.
But because Scripture is infallible – it cannot fail in its purpose – we know it will safely guide us to salvation and godliness. And because Scripture is inerrant – it contains no errors in what it affirms – we know we can trust every word, every detail, every promise, every warning.
“Sanctify them in the truth; your word is truth.” John 17:17
