This ordinance of the day of atonement was perhaps the most important and characteristic in the whole Mosaic legislation. In the law of the offerings, the most distinctive part was the law of the sin-offering; and it was on the great annual day of atonement that the conceptions embodied in the sin-offering obtained their most complete development. The central place which this day occupied in the whole system of sacred times is well illustrated in that it is often spoken of by the rabbis, without any more precise designation, as simply "_Yomà_," "The Day." It was "_the_ day" because, on this day, the idea of sacrificial expiation and the consequent removal of all sin, essential to the life of peace and fellowship with God, which was set forth imperfectly, as regards individuals and the nation, by the daily sin-offerings, received the highest possible symbolical expression. It is plain that countless sins and transgressions and various defilements must yet have escaped unrecognised as such, even by the most careful and conscientious Israelite; and that, for this reason, they could not have been covered by any of the daily offerings for sin. Hence, apart from this full, solemn, typical purgation and cleansing of the priesthood and the congregation, and the holy sanctuary, from the uncleannesses and transgressions of the children of Israel, "even all their sins" (ver. 16), the sacrificial system had yet fallen short of expressing in adequate symbolism the ideal of the complete removal of all sin. With abundant reason then do the rabbis regard it as the day of days in the sacred year. It is insisted by the radical criticism of our day that the general sense of sin and need of expiation which this ordinance expresses could not have existed in the days of Moses; and that since, moreover, the later historical books of the Old Testament contain no reference to the observance of the day, therefore its origin must be attributed to the days of the restoration from Babylon, when, as such critics suppose, the deeper sense of sin, developed by the great judgment of the Babylonian captivity and exile, occasioned the elaboration of this ritual. To this one might reply that the objection rests upon an assumption which the Christian believer cannot admit, that the ordinance was merely a product of the human mind. But if, as our Lord constantly taught, and as the chapter explicitly affirms, the ordinance was a matter of Divine, supernatural revelation, then naturally we shall expect to find in it, not man's estimate of the guilt of sin, but God's, which in all ages is the same.