Sola Scriptura is the fundamental Protestant doctrine, but how should it be practiced? Here’s how Martin Luther—the man who brought Sola Scriptura into the public mind—thought it should be lived out in the Christian life.

Sola Scriptura was the “formal issue” of the Protestant Reformation and is the chief theological commitment upon which the movement, and faithful Christian practice as a whole, is founded.

Solus Christus is absolutely essential to The Gospel—without it, Jesus Christ is demoted to a mere suggestion.

Sola Fide was the “material issue” of the Protestant Reformation and is the chief article by which the Reformed case either stands or falls.

Sola Gratia is the heart of The Gospel—it should be no surprise, then, that it is a central doctrine of Reformed Theology.