Last night I was having a discussion with a couple new friends over a great dinner. I expressed (to their agreement) that a true church service should really not be designed for unbelievers primarily, but for the building and equipping of the saints. While I do try to make the gospel clear to unbelievers each week, the primary purpose of our gathering is to edify believers and to equip them to go out from our assembly to do the work of evangelism.
Ironically, I just read the following paragraph from The Deliberate Church by Mark Dever and Paul Alexander. They write,
The Sunday morning service is the main feeding time. As such, biblical exposition is primary. It is popular to view this service primarily as an evangelistic time. As a result, many churches are calibrating these services to the musical and cultural preferences of their target audiences. According to 1 Corinthians 14, though, the purpose of the main weekly gathering of the church is not evangelism, but edification. It seems wise, then, to calibrate these services not to the preferences of unbelievers, but to the scriptural parameters given to us for the mutual edification of believers.