Over at Pyromaniacs, Phil Johnson has posted a weekly dose of Spurgeon on the issue of separation from heretics, here.
I have not much patience with a certain class of Christians nowadays who will hear anybody preach so long as they can say, "He is very clever, a fine preacher, a man of genius, a born orator." Is cleverness to make false doctrine palatable? Why, sirs, to me the ability of a man who preaches error is my sorrow rather than my admiration.
I cannot endure false doctrine, however neatly it may be put before me. Would you have me eat poisoned meat because the dish is of the choicest ware? It makes me indignant when I hear another gospel put before the people with enticing words, by men who would fain make merchandise of souls; and I marvel at those who have soft words for such deceivers.
"That is your bigotry," says one. Call it so if you like, but it is the bigotry of the loving John who wrote—"If there come any unto you, and bring not this doctrine, receive him not into your house, neither bid him God speed: for he that biddeth him God speed is partaker of his evil deeds."
I would to God we had all more of such decision, for the lack of it is depriving our religious life of its backbone and substituting for honest manliness a mass of the tremulous jelly of mutual flattery.
He who does not hate the false does not love the true; and he to whom it is all the same whether it be God's word or man's, is himself unrenewed at heart. Oh, if some of you were like your fathers you would not have tolerated in this age the wagon loads of trash under which the gospel has been of late buried by ministers of your own choosing. You would have hurled out of your pulpits the men who are enemies to the fundamental doctrines of your churches, and yet are crafty enough to become your pastors and undermine the faith of a fickle and superficial generation.