Scripture is God’s true, perfect, delightful, inspired and sufficient word to the world. While every Christian I know affirms all of this, in practice the sufficiency of Scripture seems to be getting far less attention, and I am convinced that it is the most important aspect of Scripture for the church in the 21st century to wrestle with. It is possible to affirm verbal, plenary inspiration and the inerrant and infallible nature of Scripture, and still miss the principle that it is enough; that the Scripture alone is our only rule in faith and practice. When we miss this truth, we may find ourselves falling into the errors of legalism, speculative theology, or ecclesiological invention that goes beyond and works against what God has revealed. If we really believe in both the authority and sufficiency of God’s word, then we will embrace both certainty and mystery when it comes to our faith and express that faith in confidence and humility.