Most of them, having good attitudes, have remedied their deficiency. The practice of subscribing to some scripturally-based doctrines, without practically embracing the importance of all Scripture, leads to no discipleship at all or, at best, a lopsided kind of discipleship amounting to alignment with a theory, a method, a project, a denomination or a person, producing loyalty to a school of thought, rather than to the Lord Himself. The result is sectarianism, schisms in the body of Christ, and misunderstandings between the saints. I have, from time to time, likened the practice of studying very deeply into certain specific doctrinal positions before reading the whole Bible to shaft mining. That means we dig deep holes in our Bibles and become firmly convinced of a doctrinal position before we have read, unbiasedly, everything in Scripture that would modify our conclusions.
All Scripture is profitable for doctrine.
Therefore a continual, contextual reading of the whole Bible is an invaluable pursuit which I would liken to strip mining. As we read through the whole Bible, we encounter not only delightfully familiar green pastures whose content we absorb so easily but also tedious desert portions that seem to be filled with unimportant facts, unpronounceable names, and incomprehensible ceremonies. But in so doing, everything is kept in context, and every once in a while, even the desert places blossom like a rose, yielding fruits and flowers that produce spiritual revelation so key to understanding whatever else God is teaching us, which we would have otherwise missed. All Scripture is profitable for reproof, correction and instruction in righteousness. For some it is a difficult thing to commit oneself to the idea that everything God has said about everything is right.