While there are many potential symptoms of a sick church, I have found ten to be consistently common.
The Gospel is How Different our Savior is, Not How Different our Churches Are
14 But when Paul was about to open his mouth, Gallio said to the Jews, “If it were a matter of wrongdoing or vicious crime, O Jews, I would have reason to accept your complaint. 15 But since it is a matter of questions about words and names and your own law, see to it yourselves. I refuse to be a judge of these things.” Acts 18:14-15 ESV