60. In the revised Euchologion, just as in the Euchologion of Grottaferrata, once Cardinal Bessarion's, and in the most ancient manuscripts, there is a prayer which mentions the distinction made in the old Law between clean and unclean foods as well as the uncleanness in the eyes of the Law of anyone who ate unclean food. The prayer goes on to say that the one who has eaten unclean foods cannot receive the precious Body and Blood of Christ without sin. The contents and expressions of this prayer and others like it occasioned a discussion of whether one might well suspect that the observance of the legal ceremonies of the old Law was being added to or retained alongside the new law and the Gospel. To understand whether there are any grounds for this suspicion, We will touch briefly on the following considerations. They will throw light on all aspects of the question and the reason for each detail will be plain.