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If our church right at this point has always taken this most seriously and has not admitted to the Lutheran celebration of the Lord’s Supper those who reject the Lutheran doctrine of the Sacrament, it has not thereby anticipated the last judgment. In the ancient church the communicant, to whom the consecrated elements were given with the words “The body of Christ” and “The blood of Christ,” answered with his “Amen.” How can one who is Reformed say Amen to the Lutheran distribution formula? He must take offense at it. Who gives us the right to mislead someone into an unworthy reception of the Lord’s Supper in that he does not discern the body of the Lord (1 Cor. 11:29), and to whom would we want to be accountable for it? Is that Christian love?
Herman Sasse - Letters to Lutheran Pastors - Volume 1