It's a shame the word "fellowship" has fallen on hard times in some circles, and is dying the death of domestication and triviality. It is an electric reality in the New Testament, an indispensable ingredient in the Christian faith, and one of God's chief means of grace in our lives. The koinonia -- the commonality, partnership, fellowship -- which the first Christians shared wasn't a common love for pizza, pop, and a nice clean evening of fun among the fellow churchified. It was their common Christ, and their common life-or-death mission together in his summons to take the faith worldwide in the face of impending persecution.
Rightly did Tolkien call his nine a "Fellowship of the Ring." This is no chummy hobnob with apps and drinks and a game on the tube. It is an all-in, life-or-death collective venture in the face of great evil and overwhelming opposition. True fellowship is less like friends gathered to watch the Super Bowl, and more like players on the field in blood, sweat, and tears, huddled in the backfield only in preparation for the next down. True fellowship is more the invading troops side by side on the beach at Normandy, than it is the gleeful revelers in the street on V.E. Day.
[Read the rest of the article at Desiring God.]