Sola scriptura (Latin: by Scripture alone) is a Christian theological doctrine which holds that the Christian Scriptures are the supreme authority in all matters of doctrine and practice. Sola scriptura does not deny that other authorities govern Christian life and devotion, but sees them all as subordinate to and corrected by the written word of God.
Sola scriptura is a formal principle of many Protestant Christian denominations, and one of the five solas. It was a foundational doctrinal principle of the Protestant Reformation held by the Reformers, who taught that authentication of Scripture is governed by the discernible excellence of the text as well as the personal witness of the Holy Spirit to the heart of each man. Some Evangelical and Baptist denominations state the doctrine of sola scriptura more strongly: Scripture is self-authenticating, clear (perspicuous) to the rational reader, its own interpreter (“Scripture interprets Scripture”), and sufficient of itself to be the final authority of Christian doctrine