" Modern liberalism may be criticized (1) on the ground that it is un-Christian and (2) on the ground that it is unscientific. We shall concern ourselves here chiefly with the former line of criticism; we shall be interested in showing that despite the liberal use of traditional phraseology modern liberalism not only is a different religion from Christianity but belongs in a totally different class of religions. "
― J. Gresham Machen , Christianity and Liberalism