As an undergraduate English/writing major, I took a course on “Editing for Writers”. My professor would often say, “Everybody needs an editor.” Because every writer misses stuff in his or her own writing. Getting used to seeing certain mistakes in their own work, writers will skim them over, neglecting necessary revision and improvement. They want their prose or poetry to sparkle, but they cannot accomplish it alone. They have blind spots, and they need an outside set of trained eyes to recognize them. Every writer needs an editor.
So does every Christian: every Christian needs others to point out blind spots. Call it “community” or “fellowship” or “accountability”–the point is the same–every Christian needs other steel-minded and tender-hearted Christians to call them on the carpet for sin(s) they overlook. We can’t do it alone. God didn’t make us that way. We too easily skim over our own mistakes. We need our brethren who will graciously but relentlessly help us to edit our lives.