" On the other hand, there is no sin in thought, word, or deed, no matter how personal or secret, that does not inflict injury upon the whole fellowship. An element of sickness gets into the body; perhaps nobody knows where it comes from or in what member it has lodged, but the body is infected. This is the proper metaphor for the Christian community. We are members of a body, not only when we choose to be, but in our whole existence. Every member serves the whole body, either to its health or to its destruction. This is no mere theory; it is a spiritual reality. And the Christian community has often experienced its effects with disturbing clarity, sometimes destructively and sometimes fortunately. "

― Dietrich Bonhoeffer , Life Together: The Classic Exploration of Christian Community