The five solas are the Reformation’s five-word summary of the gospel — five Latin phrases, each built on the word sola (“alone”), that together answer the deepest questions a soul can ask: On what authority do I stand? How am I made right with God? By whose doing? Through whom? And for whose glory? The answer the Reformers recovered from Scripture was, in every case, alone: Sola Scriptura (Scripture alone), Sola Fide (faith alone), Sola Gratia (grace alone), Solus Christus (Christ alone), and Soli Deo Gloria (to the glory of God alone). Far from being dusty slogans, they are a living confession of the good news — and they form the theological backbone of the training offered at New Geneva Theological Seminary.
The Five Solas at a Glance
The word sola is Latin for “alone,” and each sola guards the gospel at one crucial point by insisting that the decisive credit belongs to God, not to us. Here are the five, side by side:
| Latin | In English | What it affirms |
|---|---|---|
| Sola Scriptura | Scripture alone | The Bible is God’s Word and the final authority for faith and life. |
| Sola Fide | Faith alone | Sinners are justified — declared righteous — through faith, not works. |
| Sola Gratia | Grace alone | Salvation is God’s free, undeserved gift from first to last. |
| Solus Christus | Christ alone | Jesus is the only mediator; His finished work alone saves. |
| Soli Deo Gloria | Glory to God alone | All of salvation and all of life exist for the glory of God. |
These five belong together as a single confession. Because Scripture alone is our authority, we discover that salvation is by grace alone, received through faith alone, resting on Christ alone — so that God alone receives the glory. Pull out any one and the rest begin to unravel.
Sola Scriptura — Scripture Alone
Sola Scriptura affirms that the Bible, as the inspired Word of God, is the church’s supreme and final authority — standing above popes, councils, and tradition. It does not deny that creeds, confessions, and godly teachers are useful; it insists that all of them must be tested by Scripture, because Scripture alone is God-breathed. As Paul told Timothy, “All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness” (2 Timothy 3:16).
This was the formal principle of the Reformation — the foundation on which everything else rests. If the Bible is the final word, then its gospel cannot be overruled by any human authority. The Westminster Confession later summarized the conviction by teaching that the Holy Spirit speaking in Scripture is the supreme judge of every religious controversy.
Sola Fide — Faith Alone
Sola Fide answers how a guilty sinner can be right with a holy God: not by earning it, but by receiving it through faith. Justification — God’s declaration that a sinner is righteous — is credited to those who trust in Christ, apart from their own works. “Therefore we conclude that a man is justified by faith apart from the deeds of the law” (Romans 3:28), and the result is peace: “Therefore, having been justified by faith, we have peace with God through our Lord Jesus Christ” (Romans 5:1).
Faith itself does no work; it simply rests on and receives Christ and His righteousness. This was the truth that liberated Martin Luther and lit the Reformation — the recovery that a troubled conscience finds rest not in its own performance but in what Christ has already done.
Sola Gratia — Grace Alone
Sola Gratia declares that salvation is entirely God’s free gift, unearned and undeserved. If faith is the instrument that receives salvation, grace is its source: God saves sinners not because they are worthy but because He is merciful. “For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, lest anyone should boast” (Ephesians 2:8–9).
Grace alone means we contribute nothing that earns God’s favor — not our good works, our religious effort, or our decision. From election to calling to final glory, salvation is God’s work, so that no one can boast before Him. This is the deeply humbling and deeply comforting heart of the Reformed understanding of the gospel.
Solus Christus — Christ Alone
Solus Christus affirms that Jesus Christ is the only mediator between God and man, and that His finished work — His perfect life, atoning death, and resurrection — is the sole ground of our salvation. No priest, saint, or sacrament can add to it. “For there is one God and one Mediator between God and men, the Man Christ Jesus” (1 Timothy 2:5), and “there is no other name under heaven given among men by which we must be saved” (Acts 4:12).
This is the material center of the five solas. Grace comes to us in Christ; faith lays hold of Christ; Scripture testifies of Christ. To say “Christ alone” is to say that salvation is complete in Him, needing nothing added by us.
Soli Deo Gloria — Glory to God Alone
Soli Deo Gloria is the goal toward which the other four move: because God alone saves, God alone deserves the glory. A salvation planned by the Father, accomplished by the Son, and applied by the Spirit leaves no room for human boasting — every ounce of praise belongs to Him. “For of Him and through Him and to Him are all things, to whom be glory forever. Amen” (Romans 11:36).
This sola reaches beyond salvation into all of life. The Westminster Shorter Catechism opens by asking what the chief purpose of human life is, and answers that “Man’s chief end is to glorify God, and to enjoy him forever” (WSC Q.1). Every calling, every task, and every day is an arena for that one great purpose.
Why the Five Solas Still Matter
The five solas were forged in the sixteenth century, but the questions they answer never go out of date. Every generation is tempted to add something to the gospel — a human authority beside Scripture, a work beside faith, a merit beside grace, a mediator beside Christ, a glory shared with God. The solas stand guard, returning the church again and again to a salvation that is God’s from beginning to end. They are not five separate ideas but one unified confession of grace.
To see where the solas fit within the wider Reformed faith — alongside the doctrines of grace and covenant theology — read our companion guide, What Is Reformed Theology? And if these truths stir a desire to study them deeply and teach them faithfully, that is exactly what New Geneva’s degree programs are built for. The fully online Master of Divinity forms pastors who can preach this gospel from the original languages, while shorter master’s and certificate tracks equip lay leaders to know and share it. When you sense the call to begin, the admissions process is a straightforward next step.
