Sola Scriptura is the idea that Holy Scripture - the Bible, alone, is the ultimate authority for Christian doctrine, particularly concerning our salvation. This means that the words of Scripture are the metric by which Christians are to test their doctine, not believing that which is in contradiction with Holy Scripture.

At the heart of Sola Scriptura is the idea of Scriptures sufficiency: that Scripture is enough. That it isn't lacking in either God-given authority or breadth to be our rule of faith. More simply put, Sola Scriptura means that all the truth we need for our salvation and reconcilliation with God is taught in the Bible.