“The church is not a club for those with similar cultural tastes, political views, ethnic backgrounds, and moral leanings. They do not meet because they share a hobby called spirituality or because they have the same version for transforming culture. Believers gather to be regularly reconstituted as the body of Christ, receiving Christ as their living Head. They do not gather on their own initiative but are gathered by the Spirit through his ordained means of grace.
Unlike voluntary associations (book clubs, political parties, or fans of the opera or garage bands), the church is not made up of peolpe I chose to be my friends. God chose them for me and me for them. They are my family because of God’s election, not mine. Gathered to be redefined by the kingdom of Christ rather than by the kingdoms of this age, we are then scattered again into the world as salt–not huddled together in Christian societies for moral transformation and ecclesiastically sanctioned political causes, but dispersed into the world as doctors, homemakers, plumbers, lawyers, truck drivers, citizens, and neighbors.”
~Michael Horton, Christless Christianity, p. 226