For as these memorials of the atonement were used by the ancient Patriarchs and Prophets to manifest to God their faith in the plan of redemption and in the coming Redeemer; so will these great types be again introduced as exhibiting the sacrifice of the great antitype, Jesus, the Mediator of the New Covenant, and as a perpetual recognition of the eternal salvation and exaltation wrought out by Him for the human family by the sacrifice of Himself. (See also 3 Nephi, xv, 4-8, previously quoted.) CHAPTER XVI. Brief Retrospect of the History of Sacrifice and its Symbolism--The Passover and the Lord's Supper--Christ's Relation to both these Ordinances--The Last Supper. As before stated, these sacrifices which were offered up from the days of Adam until the time of our Savior's advent, were typical of the great expiatory sacrifice which He was to make by the sacrifice of Himself. They were so many types, shadows and forms of which He was the great prototype--the substance, the reality prefigured and foreshadowed by the other sacrifices which had been offered up from the beginning. When the law was given by Moses, all the forms pertaining to the sacrificial ceremonies were revealed in detail, and the instructions in relation thereto were not simply of a general nature, but they entered into minute particulars in relation to all things connected with those who officiated, the form and pattern of the sacred utensils and of the vestments of the Priesthood, the creatures to be sacrificed, the order of the proceedings, and indeed of all matters associated with the observance of these rites. Almost the whole of the book of Leviticus, and considerable of the book of Numbers, is occupied with these instructions and kindred matters. This Mosaic law, with all its duties, observances, ceremonies and sacrifices, continued in force until Christ's death.