Practical Impact of the Doctrine of the Authority of the Scriptures

The Need to be Obedient to ScriptureIf God has revealed himself and his purposes to us in Jesus Christ as he is known to us through all the Scriptures, then clearly we are under a total obligation to submit our lives to the teaching of the Bible. It is a particular temptation of student life to imagine that truth is for the mind alone; but for Scripture 'knowing the truth' implies living it out in particular situations. In the OT, truth is primarily a moral quality implying the characteristic of dependability or faithfulness in action (e.g. Ps. 51:6). This understanding is expressed also in John's concern for doing the truth (Jn. 3:21, 1 Jn. 1:6). So this final section is integral to the exposition of the Christian doctrine of authority, for Christian truth in the deepest sense exists only where there is a mind which is set both to understand it and to obey it. If our passion for truth does not imply a passion for obedience to truth, then we are not really serious about it.
  In the end the doctrine of the authority is eminently practical. It confronts us with a specific challenge: to obey all that the Bible teaches, all of the time. Nothing could be more searching or down to earth than that.
  - p. 66, Know the Truth by Bruce Milne (italics original)

Life At Its Best - 11 on Obedience

A Christian who stays put is no better than a statue. A person who leaps about constantly is under suspicion of being not a man but a jumping jack. What we require is obedience - the strength to stand and the willingness to leap, and the sense to know when to do which. Which is exactly what we get when an accurate memory of God's ways is combined with a lively hope in his promises.
-- p. 150, Life At Its Best by Eugene Peterson

My paraphrase of/commentary on the last line above is the following:
You become discerningly obedient by reading the Bible as to find out and refresh our minds about what God has done, what God promised, how God deals with His people, what God demands of His people, and seeing all these goodness in Him and His work, have an active and decisive faith in God.