Toward the end of his life, Paul challenged Timothy with a simple but weighty exhortation: “Follow the pattern of the sound words that you have heard from me, in the faith and love that are in Christ Jesus” (2 Timothy 1:13). Paul was deeply concerned that the body of truth (“the pattern of sound words”) he and the other apostles had received from Christ would be faithfully preserved and handed on from one generation to the next.
This raises an important question: Did the church obey Paul’s instruction? Did believers, across the centuries that followed, hold fast to “the pattern of sound words” entrusted to them? The answer is found in the history of creeds and confessions—the church’s ongoing, Spirit-guided effort to state and defend apostolic truth with clarity and unity.
What is a creed?
Creeds were not written because Scripture is unclear. They were written because interpretations of Scripture differ—sometimes innocently, sometimes insidiously—and the church needed a shared, memorable way to say plainly what the apostolic faith was. We already see the seeds of this in the New Testament. When John opens his first letter by insisting that he had heard, seen, and touched “the word of life” (1 John 1:1–3), he is almost certainly countering an early denial of Christ’s physical humanity. The clear statement of belief, in opposition to error, is apostolic.
Early heresies and the rise of the ecumenical creeds
An early theologian named Arius taught that Jesus was a creature, not eternally God. He taught that there was a time when Jesus did not exist, claiming that the biblical language of Christ being “begotten” means that Jesus came into existence at some point in time.
Athanasius opposed him on two grounds rooted firmly in Scripture and worship. First, Christians confess Jesus as Saviour—and only God can save creatures. Second, the church worshipped Jesus exactly as it worshipped the Father, which would be blasphemous unless he were, in fact, God.
The dispute grew serious enough that Emperor Constantine convened the Council of Nicaea in AD 325, partly for the sake of theological truth and partly for the sake of imperial unity. The resulting Nicene Creed expressly condemned Arianism, explicitly rejecting the claim that “there was a time when the Son was not.”
Arianism was not the only challenge to sound Christology. Apollinarianism held that Christ had a human body but not a human mind. Nestorianism divided Christ into two separate persons. Monophysitism blurred his two natures—divine and human—into a single, hybrid nature. Each of these errors, however abstract they sound, carried real consequences for the doctrine of salvation. If Christ is not truly human, he cannot be our substitute; if he is not truly God, he cannot save us. As John puts it, “the Word became flesh and dwelt among us” (John 1:14)—fully God, fully man, one person.
Out of these controversies came what are known as the ecumenical creeds: the Apostles’ Creed, the Nicene Creed, the Athanasian Creed, and (by some counts) the Chalcedonian Definition. They are called “ecumenical” because they were formulated by councils represented by church leaders from all traditions and are held in common by Protestants, Roman Catholics, and the Eastern Orthodox alike. These creeds offer a rare point of agreement across otherwise divided traditions. Later councils produced decisions not shared as widely and therefore cannot properly be called ecumenical.
Why creeds matter for unity
Creeds also give confidence. Carl Trueman has written on this at length (see The Creedal Imperative and, more recently, Crisis of Confidence), which speaks directly to a church culture uncertain of its own identity. When core doctrines are left undefined, flimsy theology can quickly creep in, and the church can lose the ability to say clearly what it is.
The Reformers’ embrace of creeds
Sola Scriptura does not mean that Scripture is the church’s only authority; it means Scripture is the church’s final authority—the final rule to which every other authority must submit. Creeds, confessions, and traditions can carry real authority in the church, but that authority is always derivative, always answerable to Scripture. This is precisely where the Reformers parted ways with Rome, which effectively inverted the relationship, treating its councils and traditions as equal to Scripture.
Understood this way, the Reformers did not reject church history—they reformed it. Martin Luther, John Calvin, Ulrich Zwingli, John Knox, and the Puritans all quoted the church fathers and the ecumenical creeds approvingly. The Heidelberg Catechism, for instance, asks what faith is believed, and answers by quoting the Apostles’ Creed word for word, before devoting roughly twenty questions to expounding it. Rather than assuming the true church had been lost since the apostolic age, the mainstream Reformers understood themselves to be recovering what Scripture had always taught, not restoring something entirely absent.
Far from abolishing confessions, the Reformation produced a multiplication of them, each articulating Reformation convictions with increasing precision: the Augsburg Confession (Lutheran), the Thirty-Nine Articles (Anglican), the Heidelberg Catechism, the Belgic Confession, and the Canons of Dort (Dutch Reformed), the Westminster Confession of Faith (Presbyterian), and the Second London Baptist Confession of 1689.
The opening words of the Heidelberg Catechism illustrate why believers found—and still find—such confessions worth confessing. It asks, “What is your only comfort in life and in death?” and answer, “That I am not my own, but belong—body and soul, in life and in death—to my faithful Saviour, Jesus Christ.”
This was no abstract theologising. It was a direct answer to Rome’s system, in which assurance of salvation was uncertain, contingent on meritorious works and sacramental performance. The confessions of the Reformation staked out justification by faith alone, with all its implications for the believer’s assurance before God.
Creeds as signposts, not rivals
This last point has real, present-day weight. Issues that the early church never faced—questions of gender identity, for example—now confront every congregation, and churches that fail to define their convictions clearly risk being reshaped by the surrounding culture rather than by Scripture.