'The basis that Christians can speak to one another is that each one knows the other as a sinner, who, with all his human dignity, is lonely and lost if he is not given help. This is not to make him contemptible nor to disparage him in any way. On the contrary, it is to accord him the one real dignity that man has, namely, that though he is a sinner, he can share in God's grace and glory and be God's child. This recognition gives to our brotherly speech the freedom and candour that it needs. We speak to one aonther on the basis of the help we both need. We admonish one another against the disobedience that is our common destruction. We are gentle and we are severe with one another, for we know both God's kindness and God's severity. Why should we be afraid of each one another, since both of us have only God to fear? Why should we think that our brother would not understand us, when we understood very well what was meant when somebody spoke God's comfort or God's admonition to us, perhaps in words that were halting or unskilled? Or do we really think that there is a single person in this world who does not need either encouragement or admonition? Why, then, has God bestowed Christian brotherhood upon us?'
Dietrich Bonhoeffer, Life Together, p.82.