The sufficiency of Scripture is one of the most important and yet neglected doctrines of the 20th century. Dr. John Murray wrote, "It is because we have not esteemed and prized the perfection of Scripture and its finality, that we have resorted to other techniques, expedients, and methods of dealing with...the needs of the hour...We must bring forth from its (the Holy Scriptures) inexhaustible treasures, in exposition, proclamation, and application - application to every sphere of life - what is the wisdom and power of God for man in this age in all the particularity of his need, as for man in every age," Collected Writings, Vol. I pp. 21-22.

The Westminster Confession of Faith, I-6, also declares the sufficiency of Scripture: "The whole counsel of God, concerning all things necessary for his own glory, man's salvation, faith and life is either expressly set down in Scripture, or by good and necessary consequence may be deduced from Scripture: unto which nothing at any time is to be added, whether by new revelations of the Spirit, or traditions of men..." Dr. O. Palmer Robertson wrote, "The Reformers did not declare simply that no new writings were to be added to the Bible. They stated instead that all those former ways by which God made his will known to his people now have ceased," and "The Bible embodies God's personal selection of the special revelations he determined that the church would need through all the ages. In this written revelation from God is contained all that is needed for life and godliness.," The Final Word, (Banner of Truth), pp. 88, 60.