“The believer feels no shame, as though he were still living too much in the flesh, when he yearns for the physical presence of other Christians. Man was created a body, the Son of God appeared on earth in the body, he was raised in the body, in the sacrament the believer receives the Lord Christ in the body, and the resurrection of the dead will bring about the perfected fellowship of God’s spiritual-physical creatures. The believer therefore lauds the Creator, the Redeemer, God, Father, Son, and Holy Spirit, for the bodily presence of a brother. The prisoner, the sick person, the Christian in exile sees in the companionship of a fellow Christian a physical sign of the gracious presence of the triune God. Visitor and visited in loneliness recognize in each other the Christ who is present in the body; they receive and meet each other as one meets the Lord, in reverence, humility, and joy. They receive each other’s benedictions as the benediction of the Lord Jesus Christ. But if there is so much blessing and joy even in a single encounter of brother with brother, how inexhaustible are the riches that open up for those who by God’s will are privileged to live in the daily fellowship of life with other Christians!
It is true, of course, that what is an unspeakable gift of God for the lonely individual is easily disregarded and trodden under foot by those who have the gift every day. It is easily forgotten that the fellowship of Christian brethren is a gift of grace, a gift of the Kingdom of God that any day may be taken from us, that the time that still separates us from utter loneliness may be brief indeed. Therefore, let him who until now has had the privilege of living in common Christian life with other Christians praise God’s grace from the bottom of his heart. Let him thank God on his knees and declare: It is grace, nothing but grace, that we are allowed to live in community with Christian brethren.”
-Dietrich Bonhoeffer Life Together – The Classic Exploration of Christian Community