It is the struggle of natural human beings for self-justification. They find it only by comparing themselves with others, by condemning and judging others. Self-justification and judging belong together in the same way that justification by grace and serving belong together….
It is certain that the spirit of self-justification can only be overcome by the spirit of grace… It must be a decisive rule of all Christian community life that each individual is prohibited from talking about another Christian…
Do not speak evil against one another, brothers. The one who speaks against a brother or judges his brother, speaks evil against the law and judges the law. But if you judge the law, you are not a doer of the law but a judge. There is only one lawgiver and judge, he who is able to save and to destroy. But who are you to judge your neighbor? (James 4:11-12)
Let no corrupting talk come out of your mouths, but only such as is good for building up, as fits the occasion, that it may give grace to those who hear. (Ephesians 4:29)
Where this discipline of the tongue is practiced right from the start, individuals will make an amazing discovery. They will be able to stop constantly keeping an eye on others, judging them, condemning them, and putting them in their places and thus doing violence to them. They can now allow other Christians to live freely, just as God has brought them face to face with each other. The view of such persons expands and, to their amazement, they recognize for the first time the richness of God’s creative glory shining over their brothers and sisters. God did not make others as I would have made them. God did not give them to me so that I could dominate and control them, but so that I might find the Creator by means of them. Now other people, in the freedom with which they were created, become an occasion for me to rejoice, whereas before they were only a nuisance and trouble for me. God does not want me to mold others into the image that seems good to me, that is, into my own image. Instead, in their freedom from me God made other people in God’s own image. I can never know in advance how God’s image should appear in others. That image always takes on a completely new and unique form whose origin is found solely in God’s free and sovereign act of creation. To me that form may seem strange, even ungodly. But God creates every person in the image of God’s Son, the Crucified, and this image, likewise, certainly looked strange and ungodly to me before I grasped it.
Strong and weak, wise or foolish, talented or untalented, pious or less pious, the complete diversity of individuals in the community is no longer a reason to talk and judge and condemn, and therefore no longer a pretext for self-justification. Rather this diversity is a reason for rejoicing in one another and serving one another. Even in this new situation all the members of the community are given their special place; this is no longer the place, however, in which they can most successfully promote themselves, but the place where they can best carry out their service. In a Christian community, everything depends on whether each individual is an indispensable link in a chain. The chain is unbreakable only when even the smallest link holds tightly with the others. A community, which permits within itself members who do nothing, will be destroyed by them. Thus it is a good idea that all members receive a definite task to perform for the community, so that they may know in times of doubt that they too are not useless and incapable of doing anything. Every Christian community must know 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 the community.
The Christian community should not be governed by self-justification, which violates others, but by justification by grace, which serves others. Once individuals have experienced the mercy of God in their lives, from then on they desire only to serve.
– Dietrich Bonhoeffer (1906-45), Life Together, 94-6.