"The community is confronted and created by the Word of God. It is the communion of the saints because it is the gathering of the faithful [believing]. As such it is the confederation of witnesses, who may and must speak because they believe.
The community does not speak with words alone. It speaks by the very fact of its existence in the world; by its characteristic attitude to world problems; and moreover and especially, by its silent service to all the handicapped, weak and needy in the world. It speaks, finally, by the simple fact that it prays for the world.
The community does all this because this is the purpose of its summons [into existence] by the Word of God. It cannot avoid doing these things, since it believes." - Karl Barth, Evangelical Theology