Sola Scriptura (Latin: “by the Scriptures alone) is the Protestant theological maxim encapsulating the truth that Scripture (which is the plenary [i.e. fully] inspired, wholly infallible, wholly inerrant, and wholly sufficient Word of God) is the sole authority of faith & practice for the believer.
What is the Origin of Scripture? In short, God. The Bible finds its complete origin in the Triune God. 2 Timothy 3:16a declares, “All Scripture is given by inspiration of God.” The Greek word translated “given by inspiration of God” is θεὀπνευστος (theōpneustos). This Greek term is a composite of the individual Greek words for “God” (θεὸς – theos) and “breath” (πνευμα – pneuma); theōpneustos literally means “God-breathed.” Concerning this term, Dr. Joe Kelley aptly teaches, “Words are sounded by the exhale of breath. In a similar way, the Scriptures are the very exhale of God.” To say that the Scriptures are God-breathed is to say, in effect, that the Origin (or better yet the Originator) of Scripture is the Triune God. In Matthew 4:4, the Lord Jesus, quoting Deuteronomy 8:3 pronounces to Satan, “It is written, ‘Man shall not live by bread alone, but by every word that proceedeth out of the mouth of God.’”
Because they are God-breathed (or inspired by God), the Scriptures, also known as God’s Word, definitively and authoritatively reveal both God’s will to man and His plan of salvation. The Scriptures alone (sola Scriptura) have the authority to bind the conscience (Heb. 4:12) – not any human tradition, papal decree, or human law. 2 Timothy 3:16-17 states, “All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: 17That the man of God may be perfect, thoroughly furnished unto all good works.” In other words, Scripture is wholly sufficient for the Christian life. Simply put, God provided everything in His Word that a believer needs to know in order to live a godly life in Christ Jesus through the power of Holy Spirit. When correctly interpreted, all Scripture (i.e. both the Old Testament Scriptures and the New Testament Scriptures) is wholly sufficient and useful for doctrine, rebuking, correcting, and training in righteousness.