J. Gresham Machen, Christianity and Liberalism:
The type of religion which rejoices in pious sound of traditional phrases, regardless of their meanings, or shrinks from “controversial” matters, will never stand amid the shocks of life. In the sphere of religion, as in other spheres, the things about which men agree are apt to be the things that are least worth holding; the really important things are the things about which men will fight.
Words of Grace 