Every once in a while it is good for veteran Christians to return to the basics of the faith to remind ourselves what it is we believe and why it is we live the way we do. This is especially the case since we now live in a culture that provides little to no reinforcement of Christian doctrine or practice. Greg Gilbert, currently on the pastoral staff at Capital Hill Baptist Church (and so a colleague of Mark Dever) has written this little gem of a book, What is the Gospel? which is part of the 9Marks series of books. You can obtain the book here. Readers may be interested in viewing a panel discussion Rev. Gilbert participated in at Southern Baptist Theological Seminary about the current trend toward having multi-site congregations. You can view the video here.
I appeal to you, brothers, to watch out for those who cause divisions and create obstacles contrary to the doctrine that you have been taught; avoid them. For such persons do not serve our Lord Christ, but their own appetites, and by smooth talk and flattery they deceive the hearts of the naïve. (Romans 16:17-18)