"It has always been the case that the church has had to struggle with aberrant views in its midst. Indeed, the apostle Paul goes so far as to say that 'there must be factions [heresies] among you in order that those who are genuine among you may be recognized' (1 Cor. 11:19).
What is so different, when compared with our more recent history, is that these aberrant views on matters so central and fundamental are not outside the evangelical church but inside it. Not only so, but today these views are masquerading as something they are not. They are offered in all innocence as Christian orthodoxy, whereas, in fact, they come out of a different universe.
What we have is church practice that obliterates the underlying understanding of truth, a methodology for success without too many references to any truth, and a sense that what was once so important in the life of the church can be left behind, unexplored, unappropriated, and without consequences."
David F. Wells, from the foreword in Gary L. W. Johnson & Guy P. Waters, By Faith Alone: Answering the Challenges to the Doctrine of Justification, p. 19