The greatest and fiercest strife that Christians have, is with false brethren. If a false brother would openly say: I am a Pilate, a Herod, an Annas, that is, if he would put off the name of a believing Christian, and profess himself an open enemy to Christ, then we would patiently endure all the evil he could work upon us. But that such should bear the name of Christians, we cannot and will not endure; this rule and government over the conscience, we divines take properly unto us, and say: It is ours through the Word, we will not suffer ourselves to be bereaved of it, by any means.
(from Luther’s Table-Talk, Chapter 679 PC Study Bible formatted electronic database Copyright © 2003, 2006 Biblesoft, Inc. All rights reserved.)
Never truer words spoken!