Sola Scriptura and the Authority of Scripture

What you'll learn

Define sola Scriptura accurately and distinguish it from the caricature of “solo Scriptura”.
Explain the inspiration, inerrancy, self-attestation and sufficiency of Scripture using 2 Timothy 3:16-17 and Westminster Confession chapter 1.
Answer the question “Where is sola Scriptura in the Bible?” from Scripture and reason.

What sola Scriptura means

Sola Scriptura (Latin, Scripture alone) is the Reformation teaching that Scripture is the only infallible and final authority for Christian faith and practice. It is one of the five Reformation solas, alongside grace alone, faith alone, Christ alone and to the glory of God alone. You met it in Know Your Faith, Lesson 1; this lesson equips you to defend it.

It does not mean Scripture is the only authority of any kind. Creeds, confessions, church officers and the wisdom of the past are real authorities, but they are subordinate and fallible; they are judged by Scripture. Nor does it mean every passage is equally easy to understand, or that we read the Bible alone without the church. The caricature where each person ignores all history and reads the Bible in isolation is sometimes called solo Scriptura, and the Reformers rejected it too.

What is the difference between sola Scriptura and "solo Scriptura"?Show answer

Sola Scriptura means Scripture is the only infallible and final authority for faith and practice, while creeds, confessions, church officers and the wisdom of the past are real but subordinate and fallible authorities judged by Scripture. Solo Scriptura is the caricature in which each person ignores history and the church and reads the Bible in isolation. The Reformers rejected solo Scriptura too.

only infallible, final authority
other authorities real but subordinate
solo = Bible in isolation
Reformers rejected solo

Breathed out by God

Paul writes 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 Tim 3:16-17). The Greek word theopneustos means God-breathed. Scripture is not merely inspired in the sense of being inspiring; it is the product of God's own speech.

Two points follow. First, its authority is God's authority. Peter says the prophets “spoke from God as they were carried along by the Holy Spirit” (2 Pet 1:21). Second, its purpose is to make the believer “complete” and “equipped for every good work.” That is a claim about sufficiency: Scripture is enough to equip us for everything God requires.

A third point follows too. Because God "never lies" (Titus 1:2; Heb 6:18), what he has breathed out is true in all that it affirms. This is inerrancy: Scripture in its original writings is without error in everything it teaches, including history. As you saw in Know Your Faith, Lesson 1, the Chicago Statement on Biblical Inerrancy (1978) sets this out carefully. Inerrancy does not forbid round numbers, ordinary language ("the sun rose") or summaries of speeches; it means Scripture never affirms what is false. Lesson 4 applies this to hard passages.

What does theopneustos mean, and what two points follow from 2 Timothy 3:16-17?Show answer

Theopneustos means God-breathed: Scripture is not merely inspiring but the product of God's own speech. First, its authority is God's authority, since the prophets spoke from God as the Spirit carried them along (2 Pet 1:21). Second, it makes the believer complete and equipped for every good work, which is a claim about sufficiency.

God-breathed
God's own speech
authority is God's
sufficiency: complete, equipped

What is inerrancy, why does it follow from inspiration, and what does it not mean?Show answer

Inerrancy means Scripture in its original writings is without error in everything it teaches, including history. It follows from inspiration because Scripture is breathed out by God, and God never lies (Titus 1:2; Heb 6:18). It does not forbid round numbers, ordinary language such as "the sun rose", or summaries of speeches; it means Scripture never affirms what is false.

without error in all it affirms
original writings
God never lies
not against round numbers, ordinary language, summaries

The Westminster Confession, chapter 1

The Westminster Confession of Faith (1646), the standard of Presbyterian churches and close to the 1689 London Baptist Confession, gives a careful summary of the doctrine of Scripture in its first chapter. Key sections: The 1689 Confession, held by Reformed Baptists, follows it closely here and opens with this sentence: "The Holy Scripture is the only sufficient, certain, and infallible rule of all saving knowledge, faith, and obedience" (1.1).

1.1: Natural revelation leaves people without excuse but is not sufficient for saving knowledge; therefore God committed his word to writing.
1.4: The authority of Scripture “dependeth not upon the testimony of any man or Church, but wholly upon God (who is truth itself) the author thereof.”
1.5: The church's testimony and the excellence of Scripture are good evidences, but our full assurance of its divine authority comes from the inward work of the Holy Spirit bearing witness by and with the word in our hearts.
1.6: “The whole counsel of God concerning all things necessary for his own glory, man's salvation, faith and life, is either expressly set down in Scripture, or by good and necessary consequence may be deduced from Scripture: unto which nothing at any time is to be added, whether by new revelations of the Spirit, or traditions of men.”
1.7: Not everything is equally plain, but what is necessary for salvation is clear enough that the unlearned can understand it by ordinary means.
1.10: The supreme judge of all religious controversies is “the Holy Spirit speaking in the Scripture.”

Put Westminster Confession 1.4 and 1.5 into your own words: where does Scripture's authority come from, and how do we become fully assured of it?Show answer

According to 1.4, Scripture's authority does not depend on the testimony of any person or church but wholly on God, who is its author. According to 1.5, the church's testimony and the excellence of Scripture are good evidences, but our full assurance of its divine authority comes from the inward work of the Holy Spirit bearing witness by and with the word in our hearts.

authority from God, not church
evidences are good
full assurance from the Spirit
by and with the word

What do sections 1.6 and 1.7 teach about the sufficiency and clarity of Scripture?Show answer

Section 1.6 teaches that everything necessary for God's glory, salvation, faith and life is either expressly set down in Scripture or can be deduced from it by good and necessary consequence, and nothing is to be added by new revelations or human traditions. Section 1.7 admits that not everything is equally plain, but says what is necessary for salvation is clear enough that the unlearned can understand it by ordinary means.

whole counsel in Scripture
good and necessary consequence
nothing added
necessary things clear to all

Self-attestation

How do we know the Bible is God's word? Ultimately, because God says so in it. That sounds circular, but consider: if Scripture is God's word, there is no higher authority to appeal to. Hebrews 6:13 says that when God made a promise, “since he had no one greater by whom to swear, he swore by himself.” Any ultimate authority must be self-attesting, or it is not ultimate.

This is called the self-attestation of Scripture. It does not mean evidence is irrelevant; manuscripts, fulfilled prophecy and the resurrection are real confirmations. But the Christian's certainty does not finally rest on scholars' conclusions, which change; it rests on God speaking, and on the Spirit opening our eyes to see the divine glory of his word (1 Cor 2:12-14; 1 Thess 2:13). This connects to the presuppositional approach of Lesson 2 in Module 3: Scripture is the starting point of Christian reasoning.

How would you answer someone who says, "Believing the Bible because the Bible says so is circular"?Show answer

If Scripture is God's word, there is no higher authority to appeal to, so it must attest itself; as Hebrews 6:13 says, God swore by himself because he had no one greater. Any ultimate authority must be self-attesting, or it is not ultimate. This does not make evidence irrelevant, since manuscripts, fulfilled prophecy and the resurrection are real confirmations, but our certainty rests on God speaking and the Spirit opening our eyes, not on changing scholarly conclusions.

no higher authority
Heb 6:13
ultimate authority self-attesting
evidence confirms; Spirit assures

Where is sola Scriptura in the Bible?

Roman Catholic and Eastern Orthodox apologists often ask: “Show me the verse that says Scripture alone.” The Catholic Catechism teaches that Scripture and Tradition flow from the same divine source and must both be honoured with equal devotion and reverence (CCC 80-82), and that the Magisterium is their authentic interpreter (CCC 85). It is a fair question, and there is a good answer in several steps.

Scripture is God-breathed and sufficient (2 Tim 3:16-17). Only Scripture is said to be God-breathed, and it equips the man of God for every good work.
Jesus judged tradition by Scripture. He condemned the Pharisees for “making void the word of God by your tradition” (Mark 7:13). Tradition is accountable to Scripture, not equal to it.
The Bereans tested even an apostle by Scripture (Acts 17:11), and are commended for it.
Do not go beyond what is written (1 Cor 4:6). Paul sets the written word as the boundary.
The apostles are the foundation, laid once (Eph 2:20; Jude 3). Today the only infallible apostolic teaching we can identify is the written New Testament; no other body of apostolic tradition can be shown to come from them.

What does the Catholic Catechism teach about Scripture and Tradition, and why is "Show me the verse" a fair question?Show answer

The Catechism teaches that Scripture and Tradition flow from the same divine source and must be honoured with equal devotion, and that the Magisterium is their authentic interpreter (CCC 80-82, 85). Asking for biblical support for sola Scriptura is fair because Protestants claim Scripture is the final authority. The answer is not one proof-text but a case built in several steps from Scripture.

same source, equal devotion
Magisterium interprets
fair question
answered in several steps

Which texts show that tradition is accountable to Scripture, and how?Show answer

Jesus condemned the Pharisees for "making void the word of God by your tradition" (Mark 7:13), so tradition is judged by Scripture rather than being equal to it. The Bereans tested even the apostle Paul by the Scriptures and were commended for it (Acts 17:11). And Paul tells believers not to go beyond what is written (1 Cor 4:6), setting the written word as the boundary.

Mark 7:13
Bereans, Acts 17:11
1 Cor 4:6
written word as boundary

Sufficiency in everyday life

The doctrine is not only for debates. Because Scripture is sufficient, we do not need new revelations to know God's will, and we can test every teacher, preacher and podcast by the word. Because it is clear on what matters most, ordinary believers can read it with confidence. And because its authority comes from God, we can stand on it when culture, scholars or our own feelings disagree.

In conversation with Catholic or Orthodox friends, remember that they are not rejecting the Bible; they hold a different view of how it relates to tradition and the church. Ask good questions: “How do you know which traditions are apostolic?” and “Has the church ever been wrong?” Represent their view fairly, and show warmly why the written word alone can serve as the final judge.

Why does sola Scriptura matter in everyday Christian life, not just in debates?Show answer

Because Scripture is sufficient, we do not need new revelations to know God's will, and we can test every teacher, preacher and podcast by it. Because it is clear on what matters most, ordinary believers can read it with confidence. And because its authority comes from God, we can stand on it when culture, scholars or our own feelings disagree.

no new revelations needed
test every teacher
ordinary believers can read it
stand firm against culture

How should you approach Catholic or Orthodox friends on this topic?Show answer

Remember that they are not rejecting the Bible; they hold a different view of how it relates to tradition and the church. Ask good questions, such as "How do you know which traditions are apostolic?" and "Has the church ever been wrong?" Represent their view fairly, and warmly show why the written word alone can serve as the final judge.

they don't reject the Bible
ask good questions
represent fairly
warmly show the written word as final judge

In their own words

“Sacred Tradition and Sacred Scripture flow from the same divine wellspring, and both must be accepted and honoured with equal sentiments of devotion and reverence.” (CCC 80-82; Second Vatican Council, Dei Verbum 9)

“The task of giving an authentic interpretation of the Word of God, whether written or handed on, has been entrusted to the living teaching office of the Church alone.” (CCC 85; Dei Verbum 10)

“Paul told the Thessalonians to hold to the traditions taught by word of mouth or by letter, so oral tradition is also authoritative.” (2 Thessalonians 2:15, cited in Dei Verbum 8; see CCC 76-78)

Key texts

2 Timothy 3:16-17: Scripture is God-breathed and makes the man of God complete, the core text for inspiration and sufficiency.
Mark 7:6-13: Jesus rebukes tradition that nullifies the word of God, showing tradition must be judged by Scripture.
Acts 17:11: The Bereans test even Paul's preaching by the Scriptures and are called noble for it.
1 Corinthians 4:6: “Not to go beyond what is written” sets the written word as the boundary for teaching.
2 Thessalonians 2:15: The key text Catholic apologists cite; respond by noting that Paul refers to his own apostolic teaching, which is now accessible to us in its written form.
2 Peter 1:20-21: Scripture originates from God as the Spirit carried the prophets along, grounding its authority.

Objections and answers

Try answering each one yourself before you open the response.

“The word “sola Scriptura” isn't in the Bible, and no verse says “Scripture alone.””Show a response

Neither the word “Trinity” nor a verse saying “God is three persons in one essence” appears, yet the doctrine is clearly taught. Doctrines are drawn from the whole of Scripture by good and necessary consequence (WCF 1.6). Scripture alone is said to be God-breathed (2 Tim 3:16); it is sufficient to equip the believer for every good work (3:17); Jesus judged human tradition by the written word (Mark 7:13); the Bereans tested apostolic preaching by Scripture (Acts 17:11); and Paul warns not to go beyond what is written (1 Cor 4:6). Put together, these establish Scripture as the only infallible rule. The question is not whether the phrase appears, but whether the doctrine is taught.

“Paul said to hold to oral traditions as well as written ones (2 Thess 2:15). So Scripture alone is unbiblical.”Show a response

Paul was speaking to a church that had heard him in person. At that time, apostolic teaching came both orally and in writing, and both were authoritative because they came from an apostle. Protestants agree. The question is what that oral teaching contained and whether we can identify it today. Paul does not say there is a separate body of teaching beyond what he wrote; his oral teaching in Thessalonica concerned the gospel and Christ's return, the same content found in his letters. No one today can demonstrate that any specific doctrine, such as the bodily assumption of Mary (defined in 1950), was part of Paul's oral teaching. The only apostolic teaching we can confidently access is the written New Testament.

“Sola Scriptura produced thousands of Protestant denominations. It obviously doesn't work.”Show a response

The figure often quoted, tens of thousands of denominations, comes from counting every independent congregation and organisational difference, and includes groups that are not Protestant. Most confessional Protestants agree on the essentials: the Trinity, Christ's deity, salvation by grace through faith, and the authority of Scripture. Also, having an infallible interpreter has not prevented disagreement: Catholics argue about how to interpret the Magisterium itself, and the Eastern Orthodox and Rome, both claiming tradition, have been divided for nearly a thousand years. Division is the result of human sin and limitation, which sola Scriptura honestly admits. The solution is not another fallible human authority claiming infallibility, but humble submission to the word God has given.

“Before the New Testament was written, the church relied on oral tradition. So tradition came first.”Show a response

That is true, and Protestants affirm it. During the apostolic era, God was still giving revelation, and the apostles' living voice was authoritative. Sola Scriptura applies to the church's situation after the apostles, when revelation was complete and the apostles were gone. Even then, notice that the oral teaching was the apostles' own teaching, which they themselves put into writing so that it would be preserved (Luke 1:1-4; John 20:31; 2 Pet 1:15). God's normal pattern, from Moses onward, is to inscripturate his word for future generations (Exod 24:4; Deut 31:24-26). The fact that the church once had living apostles does not mean it has them today.

“When Paul wrote 2 Timothy 3:16, the New Testament didn't exist yet. He meant the Old Testament, so the verse can't prove the New Testament is God-breathed or that Scripture alone is enough.”Show a response

You're right that Timothy's childhood Scriptures were the Old Testament, but the argument still works. Paul says "all Scripture" is God-breathed, and the New Testament itself counts apostolic writings as Scripture: Peter places Paul's letters among "the other Scriptures" (2 Pet 3:16), and Paul quotes a saying matching Luke 10:7 as Scripture alongside Deuteronomy (1 Tim 5:18). So the category "Scripture" was already growing to include apostolic writings. And the sufficiency point is even stronger than it looks: if the Old Testament alone could make the man of God complete and equipped for every good work, how much more the Old and New Testaments together? The verse does not need to list every book to establish what Scripture is: God's own speech, carrying his authority, and enough to equip us for everything he requires.

“Every holy book claims to come from God. If self-attestation proves the Bible, it proves the Quran or the Book of Mormon too.”Show a response

Good point: a book claiming to be from God doesn't settle anything by itself. Self-attestation means something more specific. Any ultimate authority must be its own final witness, because there is nothing higher to appeal to; even God swore by himself (Heb 6:13). So the question isn't whether a book claims authority, but which claimed authority is actually God speaking. Christians don't say the Bible's claim is the only consideration. Its divine qualities, its coherence, fulfilled prophecy, its reliable transmission and above all the resurrection of Jesus are real confirmations, and Christians welcome comparing them. At the same time, our final certainty doesn't rest on a scholar's verdict but on God's Spirit opening our eyes to the glory of his word (1 Cor 2:12-14). I'd encourage you to read a Gospel and test it for yourself.

Written task

Write a 300-400 word answer to a Catholic friend who asks, “Where does the Bible teach sola Scriptura?” First state the Catholic view fairly (citing CCC 80-85 or Dei Verbum), then define sola Scriptura correctly, build the case from at least four biblical texts, and use Westminster Confession chapter 1.

Hand this in to Mr Scott. He will look for:

States the Catholic position accurately with citations before responding.
Defines sola Scriptura correctly and distinguishes it from solo Scriptura.
Uses at least four relevant texts accurately, including 2 Timothy 3:16-17.
Integrates at least two sections of WCF chapter 1 (or the parallel 1689 Confession) appropriately.
Answers 2 Thessalonians 2:15 and keeps a respectful tone.