Respectfully, this comes from a misreading of texts like "the letter kills, the Spirit makes alive." That's not what it means. Paul is referring specifically to the Mosaic Law in all its strictest demands--the law that reveals our need for Christ, and drives us to him. He is not saying "all written words kill." What advice did he give Timothy, the young pastor? "Give himself" to ... what? And what advice did he give about his pastoral role? For what were the Bereans praised? "Searching the Scriptures daily..." Everything David says about God's word in Pslam 119 is still true today. The two sides of this equation are these: 1) the perspicuity of Scripture (i.e., it is clearly visible in and of itself); and 2) the perspicacity of the reader (i.e., his ability to see clearly that which is clearly there). We are born blind, sinful, and with 'scales on our eyes' such that we cannot see clearly what is clearly to be seen. The Spirit's work in us causes the scales to drop so that we can see Christ in all the Scriptures (where others find only laws and a righteousness that comes from following the law vs a righteousness that comes by faith). Saying that we don't need scripture if we're "really" saved is like saying we don't need the North Star if we're "really" sailors.

All Saints need the sustenance of God's Word daily. There are many good expositions of Scripture on this. Washer does an excellent job on his pamphlet summarizing the ordinary means of grace that God has provided in order to prepare His people in sanctification. Examine yourself: if you do not feel called to live in the word, to communion with your Father daily, to fellowship at church... You might be decieving yourself. The indwelling of the Spirit will make these things sure. There are no lone wolves in God's adopted family.