J. Gresham Machen on Chrisitianity and Culture

Christianity may be subordinated to culture. That solution really, though to some extent unconsciously, is being favored by a very large and influential portion of the Church today. For the elimination of the supernatural in Christianity—so tremendously common today—really makes Christianity merely natural. Christianity becomes a human product, a mere part of human culture. But as such it is something entirely different from the old Christianity that was based upon a direct revelation from God. Deprived thus of its note of authority, the gospel is no gospel any longer; it is a check for untold millions—but without the signature at the bottom. So in subordinating Christianity to culture we have really destroyed Christianity, and what continues to bear the old name is a counterfeit.