Hence it is vitally necessary that every Christian community from the very outset face this dangerous enemy squarely, and eradicate it. There is no time to lose here, for from the first moment when a man meets another person he is looking for a strategic position he can assume and hold over and against that person. There are strong persons and weak ones. If a man is not strong, he immediately claims the right of the weak as his own and uses it against the strong. There are gifted and ungifted persons, simple people and difficult people, devout and less devout, the sociable and the solitary. Does not the ungifted person have to take up a position just as well as the gifted person, the difficult one as well as the simple? And if I am not gifted, then perhaps I am devout anyhow; or if I am not devout it is only because I do not want to be. May not the sociable individual carry the field before him and put the timid, solitary man to shame? Then may not the solitary person become the undying enemy and ultimate vanquisher of his sociable adversary? Where is there a person who does not with instinctive sureness find the spot where he can stand and defend himself, but which he will never give up to another, for which he will fight with all the drive of his instinct of self assertion?
All this can occur in the most polite or even pious environment...It is the struggle of the natural man for self-justification. He finds it only in comparing himself with others, in condemning and judging others. Self-justification and judging others go together, as justification by grace and serving others go together.
In a Christian community everything depends upon whether each individual is an indispensable link in a chain. Only when even the smallest link is securely interlocked is the chain unbreakable. A community which allows unemployed members to exist within it will perish because of them. It will be well, therefore, if every member receives a definite task to perform for the community, that he may know in hours of doubt that he, too, is not useless and unusable. Every Christian community must realize that not only do the weak need the strong, but also that the strong cannot exist without the weak. The elimination of the weak is the death of fellowship.
From "Life Together: The Classic Exploration of Christian Community" by Dietrich Bonhoeffer (pp 90-91, 94)