What should an on fire believer do in a lukewarm church?

What should a believer do if the church group he fellowships with is lukewarm, such as not standing up for the whole of Biblical truth or not volunteering with spiritual gifts to build up the church?
Should a believer leave, try to reform from within, take a teaching position, or what?

Clarify • Share • Report • Asked May 10 2016 • Michael Conrad