Bob Bixby's post yesterday on Mark Dever's open rebuke of dangerous theology in the SBC cited a great quote from George Whitefield about speaking unpopular truth to one's own denomination about its particular areas of sin and deficiency. I just checked my own copy of Iain Murray's Evangelicalism Divided (Bob's source for the quote), and not at all to my surprise the same quote is underlined and accompanied by a brief note of personal application in the margin.
So what's the answer to the question in the title? It's certainly not a rhetorical question. I can think of several answers and specific examples off the top of my head. I've linked to and/or quoted some of them.
But I'm interested in which sermons, articles, books, or other exhortations have stood out to you. A collective effort might be helpful to many. Links would be great, but don't let any unavailability hold you back.
Thanks in advance. Perhaps after the weekend I'll share the list of what leapt into my mind.