"Biblical ignorance within the church may well be deeper and more widespread than at any other time since the Protestant Reformation. If you doubt that, compare the typical sermon of today with a randomly chosen published sermon from any leading evangelical preacher prior to 1850. Also compare today's Christian literature with almost anything published by evangelical publishing houses a hundred years or more ago.
Bible teaching, even in the best of venues today, has been deliberately dumbed-down, made as broad and as shallow as possible, oversimplified, adapted to the lowest common denominator---and then tailored to appeal to people with short attention spans. Sermons are almost always brief, simplistic, overlaid with as many references to pop culture as possible, and laden with anecdotes and illustration. (Jokes and funny stories drawn from personal experience are favored over cross-references and analogies borrowed from Scripture itself.) Typical sermon topics are heavily weighted in favor of man-centered issues (such as personal relationships, successful living, self-esteem, how-to lists, and so on)---to the exclusion of the many Christ-exalting doctrinal themes of Scripture."
-John MacArthur, The Truth War