What are the Five Solas?
Question 07087
The Five Solas are the foundational principles of the Protestant Reformation, expressed in five Latin phrases that summarise what the Reformers recovered from Scripture in their challenge to the teaching and practice of the Roman Catholic Church. They are not five separate doctrines so much as five facets of one great truth: salvation is entirely God’s work, received by faith, revealed in Scripture, accomplished through Christ, and directed toward God’s glory alone.
Sola Scriptura: Scripture Alone
Sola Scriptura affirms that the Bible alone is the final authority for faith and practice. This does not mean that tradition, reason, and experience have no value. It means that none of them can override Scripture. When tradition contradicts the Word of God, the tradition must yield. When human reasoning conflicts with what Scripture clearly states, the reasoning is re-examined. The Roman Catholic position, both then and now, is that Scripture and Sacred Tradition together form the deposit of faith, interpreted authoritatively by the Magisterium. The Reformers saw that this arrangement effectively placed the church above Scripture, since the church determined what tradition said and what Scripture meant. Sola Scriptura restores the Bible to its proper place: the Word of God stands over the church, not under it.
Paul’s instruction to Timothy is the foundational text: “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 sufficiency claim is embedded in the word “complete.” Scripture equips the believer thoroughly. Nothing essential is missing from it, and nothing external to it carries the same authority.
Sola Fide: Faith Alone
Sola Fide affirms that justification is by faith alone, apart from works of any kind. This was the doctrine that Luther called articulus stantis et cadentis ecclesiae, the article by which the church stands or falls. Romans 3:28 states it with unmistakable clarity: “For we hold that one is justified by faith apart from works of the law.” Ephesians 2:8-9 confirms it: “For 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, so that no one may boast.”
The Roman Catholic position, formally defined at the Council of Trent (1545-1563), is that justification involves an infusion of grace that makes the person inherently righteous over time, and that works performed in a state of grace contribute to the believer’s justification. The Reformers insisted that justification is forensic: it is God’s declaration that the believing sinner is righteous, based not on anything in the believer but on the righteousness of Christ received by faith. Faith alone justifies, though the faith that justifies is never alone: it produces good works as its fruit (James 2:17), but those works are the evidence of justification, not its basis.
Sola Gratia: Grace Alone
Sola Gratia affirms that salvation is entirely by the grace of God and not by human merit. Grace is not merely God’s contribution to a cooperative effort; it is the entire cause of salvation from beginning to end. The sinner contributes nothing to salvation except the sin that made it necessary. Titus 3:5 states it plainly: “He saved us, not because of works done by us in righteousness, but according to his own mercy, by the washing of regeneration and renewal of the Holy Spirit.”
This does not reduce the human person to a passive object. The Spirit convicts (John 16:8-11), the cross draws (John 12:32), and the person is called to respond in repentance and faith. But the initiative is entirely God’s, the provision is entirely God’s, and the completion will be entirely God’s. The glory belongs to Him alone because the work is His alone.
Solus Christus: Christ Alone
Solus Christus affirms that Jesus Christ is the sole mediator between God and humanity. “There is one mediator between God and men, the man Christ Jesus” (1 Timothy 2:5). “There is salvation in no one else, for there is no other name under heaven given among men by which we must be saved” (Acts 4:12). The Reformers directed this particularly against the Roman Catholic practices of praying to saints, invoking the intercession of Mary, and the sacerdotal priesthood’s claim to mediate between God and the laity through the sacraments. If Christ alone is the mediator, then no human priest, no departed saint, and no ecclesiastical institution stands between the believer and God.
The implications extend beyond Roman Catholic errors. Any system that places a human mediator, a spiritual experience, a sacramental rite, or a religious institution between the individual and Christ is a departure from Solus Christus. Access to God is through Christ alone, by faith alone, and the priesthood of every believer (1 Peter 2:9) means that every Christian has direct access to the Father through the Son.
Soli Deo Gloria: To God Alone Be the Glory
Soli Deo Gloria affirms that the ultimate purpose of salvation, and of all things, is the glory of God. “For from him and through him and to him are all things. To him be glory forever. Amen” (Romans 11:36). Salvation is not primarily about human need, though it addresses it. It is about God’s glory displayed in His mercy, His justice, His love, and His faithfulness. The Reformers saw that the Roman system had directed glory toward the institution, the hierarchy, the saints, and the sacramental system in ways that detracted from the glory due to God alone.
This final sola holds the other four together. Scripture alone is the authority because it is God’s Word, and God alone deserves to set the terms. Faith alone is the instrument because grace alone is the cause, and grace alone is the cause because Christ alone has done the work. And all of it exists so that God alone receives the glory. Any departure from any of the five ultimately diminishes God’s glory by attributing to human effort, human institutions, or human merit what belongs to Him alone.
So, now what?
The Five Solas are not historical relics from a sixteenth-century controversy. They are permanent markers of where the gospel stands. Every generation faces the temptation to add something to grace, something to faith, something to Christ, something to Scripture, and to direct glory toward something other than God. The Solas exist to call the church back to the simplicity and sufficiency of the gospel as Scripture presents it. They are not a creed to replace Scripture but a summary of what Scripture teaches about the most important questions a human being can ask: How am I saved? On what authority? Through whom? By what means? And for whose glory?
“For from him and through him and to him are all things. To him be glory forever. Amen.” Romans 11:36