The Freelance Christian?

The freelance Christian, who follows Jesus but is too good, too busy, or too self-sufficient for the church, is a walking contradiction. In the old covenant, God set his people apart from the nations. In the new covenant, he sets us apart as we live among the nations. But all of Scripture testifies that believers cannot be godly or fruitful without joining God's family and realizing some form of separation from the world. 

~Daniel M. Doriani, I Peter Reformed Expository Commentary