The Catholic argument is not that Scripture is insufficiently inspired, trustworthy, or authoritative. Sacred Scripture is the inspired word of God and therefore teaches truth without error for the sake of our salvation (2 Timothy 3:16; 2 Peter 1:20–21; Dei Verbum §§11, 21).
The question is narrower:
Did Christ establish Scripture as the Christian’s sole infallible rule of faith, interpreted independently of apostolic Tradition and the teaching authority of the Church?
The biblical evidence points instead to a threefold pattern:
- Sacred Scripture
- Apostolic Tradition, both oral and written
- The authoritative Church established by Christ to preserve and interpret the apostolic deposit
These are not rival authorities. They transmit and safeguard the one revelation of God.
1. Christ established an authoritative Church
Matthew 16:18–19
Christ establishes His Church upon Peter, gives him the keys of the kingdom, and grants authority to bind and loose.
The keys recall the office of the royal steward in Isaiah 22:20–22. Peter is therefore not merely given permission to preach; he receives an office of governing authority within Christ’s kingdom. Binding and loosing were also terms associated with authoritative judgments concerning doctrine and discipline.
This passage points not to an invisible collection of individual interpreters but to a visible Church possessing authority from Christ. The Fathers recognized both Christ and Peter’s confession as foundational, while also recognizing Peter’s particular ecclesial office; these interpretations are complementary rather than mutually exclusive (St. Thomas Aquinas, Catena Aurea on Matthew 16).
Matthew 18:17–18
When a dispute cannot be settled privately, Christ commands that it be brought before the Church. If the offender refuses to hear the Church, he is to be treated as outside the covenant community. Christ then gives the apostles authority to bind and loose.
This makes little sense if every Christian remains the final judge of doctrine. Christ presents the Church as possessing real authority to render judgments that oblige the faithful.
Luke 10:16
Christ identifies the reception of His authorized messengers with the reception of Christ Himself—and their rejection with the rejection of Christ and the Father.
Therefore, Christ’s teaching authority is exercised not only through a written text but also through living, authorized witnesses.
2. Christ promised divine assistance to His apostolic teachers
John 14:26
Christ promises that the Holy Spirit will teach the apostles and bring to their remembrance what He had taught them.
The New Testament therefore originates within the Spirit-guided apostolic Church. The Church did not arise from a completed New Testament; rather, the New Testament was written, preserved, and recognized within the already-existing Church.
John 16:12–13
Christ tells the apostles that the Spirit will guide them into the fullness of truth. This promise applies directly to the apostolic witnesses and, by implication, supports the Church’s faithful preservation of their teaching.
It does not mean that every individual Christian interpretation will be correct. The New Testament repeatedly warns that people can distort apostolic teaching and Scripture itself (Acts 20:29–30; 2 Peter 3:16).
3. Acts 15 shows how the early Church settled doctrinal controversy
Acts 15:1–29
A major dispute arose over whether Gentile converts had to be circumcised and observe the Mosaic Law. Notice how the controversy was settled:
- The dispute was brought to the apostles and presbyters in Jerusalem.
- The Church held a council.
- Peter gave authoritative testimony.
- Paul and Barnabas testified about God’s work among the Gentiles.
- James formulated the pastoral judgment.
- The council issued a binding decree to the churches.
- The decision was presented as the judgment of the Holy Spirit and the apostolic Church.
The council used Scripture—especially in James’s argument—but the controversy was not settled by telling every Christian to read the Old Testament and decide privately. It was settled through the Church’s Spirit-assisted apostolic authority.
Acts later describes Paul and Timothy delivering these conciliar decrees to the churches for observance (Acts 16:4). This is an excellent biblical model of Scripture, Tradition, and ecclesial authority working together.
4. The apostles explicitly commanded Christians to preserve oral Tradition
1 Corinthians 11:2
Paul praises the Corinthians for maintaining the traditions he had delivered to them. Apostolic tradition is therefore not presented as inherently corrupt or opposed to God’s word.
Scripture distinguishes between:
- Merely human traditions that contradict God’s commandments (Matthew 15:1–9; Mark 7:8–13)
- Apostolic traditions that Christians are commanded to preserve (1 Corinthians 11:2; 2 Thessalonians 2:15; 3:6)
Thus, Christ’s condemnation of human traditions cannot be used to reject apostolic Tradition.
2 Thessalonians 2:15
This is perhaps the clearest text. Paul commands Christians to remain firm and preserve the apostolic traditions taught to them in two ways:
- By word of mouth
- By apostolic letter
Paul does not subordinate the oral form to the written form. Both communicate the same apostolic faith and bind Christians.
Sola Scriptura, by contrast, says that only the written form can function as the Church’s infallible rule. That limitation is not found in Paul’s instruction.
2 Thessalonians 3:6
Paul again commands Christians to avoid those who do not live according to the tradition received from the apostles. Apostolic Tradition governs Christian conduct as well as doctrine.
5. Apostolic teaching was intended to be transmitted through successors
2 Timothy 2:2
Paul describes four generations of transmission:
- Christ’s teaching entrusted to Paul
- Paul teaching Timothy
- Timothy entrusting it to faithful men
- Those men becoming capable of teaching others
This is an outline of apostolic succession. The faith is not merely placed in a book and handed to independent readers. It is entrusted to reliable teachers who are qualified to teach succeeding generations.
This agrees with Paul’s instructions that Titus appoint presbyters who hold firmly to the received doctrine and can refute error (Titus 1:5–9). It also agrees with the appointment of bishops and deacons to govern the Church (1 Timothy 3:1–13).
6. The Church—not Scripture alone—is called the foundation of truth
1 Timothy 3:15
Paul identifies the Church of the living God as the pillar and foundation of truth.
This does not mean that the Church is greater than God’s word or can invent new revelation. It means that God established the Church to uphold, preserve, proclaim, and defend revealed truth. St. Thomas explains that the Church is the assembly of believers belonging to the living God and therefore must live in holiness (St. Thomas Aquinas, Commentary on 1 Timothy §3:125–127).
The Bible never calls Scripture the sole infallible rule of faith. It does, however, explicitly assign this foundational ministry to the Church.
7. The Church is built upon apostolic witnesses
Ephesians 2:19–20
Christians are members of God’s household, built upon the foundation of the apostles and prophets, with Christ as the chief cornerstone.
Christ is the ultimate foundation and source of all truth. Nevertheless, He wills to build His household upon apostolic ministers and their authoritative witness. The Church is therefore apostolic by its very constitution.
This same pattern appears in Revelation 21:14, where the foundations of the heavenly Jerusalem bear the names of the twelve apostles.
8. Second Timothy 3 does not teach Scripture alone
2 Timothy 3:14–17
This is the principal text used to defend sola Scriptura, but it does not actually say that Scripture is the sole rule of faith.
Paul first tells Timothy to continue in what he has learned and to remember from whom he learned it. Thus, the passage begins with received apostolic instruction and trustworthy teachers, not with Scripture isolated from Tradition.
Paul then teaches that every Scripture is divinely inspired and profitable for teaching, correction, and training in righteousness, so that the man of God may be equipped for every good work.
Catholics affirm all of this. But:
- Inspired does not mean the only authority.
- Profitable does not mean formally sufficient by itself.
- Being equipped through Scripture does not exclude being equipped through apostolic preaching, the Church, sacraments, or pastoral authority.
Moreover, the sacred writings Timothy had known from infancy were principally the Old Testament. If this passage established the formal sufficiency of whatever Scriptures Timothy possessed as a child, it would seem to prove the sufficiency of the Old Testament without the New.
The passage proves Scripture’s divine inspiration, efficacy, and indispensable role. It does not state sola Scriptura.
9. Scripture itself can be difficult and dangerously misinterpreted
2 Peter 3:15–16
Peter recognizes Paul’s letters alongside the Scriptures, supporting the inspired status of apostolic writings. But Peter also observes that some things in Paul’s letters are difficult to understand and that ignorant and unstable people distort them, as they do the other Scriptures.
Therefore:
- Scripture is authoritative.
- Not every passage is equally clear.
- Individual readers can distort Scripture.
- Sincerity and possession of the biblical text do not guarantee a correct interpretation.
This creates the need for an authoritative apostolic rule of faith and teaching Church, rather than autonomous private judgment.
The Ethiopian eunuch’s response in Acts 8:30–35 illustrates the same principle: reading Scripture does not eliminate the need for an authorized teacher.
10. Scripture comes from the apostolic Church and is received by her
2 Peter 1:20–21
Prophecy does not originate merely from human initiative; men spoke from God under the movement of the Holy Spirit. Catholics therefore receive Scripture as truly inspired by God.
But inspiration alone does not identify which books belong to Scripture. No inspired biblical passage supplies a complete table of contents for the Bible. The Christian must know, for example, that Hebrews, James, Jude, Revelation, and the four canonical Gospels belong to Scripture, while other ancient religious writings do not.
Historically and theologically, the canon is received through the Church’s apostolic Tradition and authoritative discernment. St. Thomas notes that the canonical books have normative authority for faith while also situating Scripture within the living Church and its reception (Commentary on Ephesians; Commentary on John).
Thus, sola Scriptura presupposes knowledge—the identity of Scripture—which cannot itself be derived from Scripture alone.
11. The apostles taught more than they committed to writing
John 20:30 and 21:25
John explicitly indicates that Jesus did and taught more than what was written in his Gospel. This alone does not prove that every unwritten deed became apostolic Tradition. Nevertheless, it disproves the assumption that Christ intended every relevant apostolic teaching to be exhaustively recorded in a single written source.
Acts 20:31–35
Paul reminds the Ephesian presbyters of teachings and admonitions he personally gave them over several years. He even preserves a saying of Jesus not recorded in the four Gospels. This demonstrates that authentic teaching about Christ circulated authoritatively through oral apostolic transmission.
1 Corinthians 15:1–8
Paul says that he delivered what he had first received regarding Christ’s death, burial, Resurrection, and appearances. This language of receiving and delivering describes an apostolic tradition already functioning before much of the New Testament was written.
The cumulative biblical argument
The argument can be stated simply:
- Christ established a visible and authoritative Church (Matthew 16:18–19; 18:17–18).
- Christ authorized apostolic messengers to speak in His name (Luke 10:16).
- He promised the Holy Spirit’s guidance to His apostles (John 14:26; 16:13).
- The apostolic Church settled doctrinal controversies authoritatively (Acts 15:1–29; 16:4).
- Christians were commanded to preserve both oral and written apostolic Tradition (1 Corinthians 11:2; 2 Thessalonians 2:15; 3:6).
- Apostolic teaching was transmitted through successive generations of authorized teachers (2 Timothy 2:2; Titus 1:5–9).
- The Church is the pillar and foundation of truth (1 Timothy 3:15).
- Scripture is inspired, indispensable, and normative, but Scripture never says that it is the sole infallible authority (2 Timothy 3:14–17).
- Scripture warns that it can be distorted by unstable interpreters (2 Peter 3:15–16).
- Scripture does not provide its own complete canon, so the doctrine of Scripture itself requires the Church’s received apostolic Tradition.
Conclusion
The biblical model is not:
Scripture versus the Church
Nor is it:
Scripture plus later human inventions
It is:
God’s one revelation, transmitted through Sacred Scripture and Apostolic Tradition, authentically guarded and interpreted by the Church established by Christ.
The Church is not above the word of God but serves it. Scripture, Tradition, and the Church’s teaching office are inseparably ordered to the same apostolic faith (Dei Verbum §§9–10; Catechism of the Catholic Church §§80–87). Therefore, the Catholic rejects sola Scriptura precisely in order to receive the whole apostolic inheritance—including everything Scripture itself teaches about Tradition and the Church.
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