It is not simply to be taken for granted that the Christian has the privilege of living among other Christians. Jesus Christ lived in the midst of his enemies. At the end all his disciples deserted him. On the Cross he was utterly alone, surrounded by evildoers and mockers… So between the death of Christ and the Last day it is only by a gracious anticipation of the last things that Christians are privileged to live in visible fellowship with other Christians. It is by the grace of God that a congregation is permitted to gather visibly in this world to share God’s Word and sacrament.
Dietrich Bonhoeffer, Life Together