It was on this day also that God said to Moses: "A heavy blow of fate had fallen upon Aaron to-day, but instead of murmuring he thanked Me for the death that robbed him of his two sons, which proves his trust in My justice toward them, who had deserved punishment more severe. Go then, and comfort him; and at the same time tell him 'that he come not at all times into the holy place within the vail before the mercy seat, which is upon the Ark.'"
These last words greatly aggrieved Moses, who not thought: "Woe is me! For it seems as if Aaron had lost his rank, since he may not at all times enter the sanctuary. The statement of the periods for his admission into the sanctuary is also so indeterminate that I am not at all sure whether they are to recur hourly, or daily, or annually, every twelve years, perhaps even seventy, or not at all." But God replied: "Thou art mistaken, I was not thinking of fixing a certain time.
Whether hour, or day or year, for Aaron may enter the sanctuary at any time, but when he does so, he must observe certain ceremonies." The ceremonies that Aaron, as well as every other high priest, had to perform on the Day of Atonement before his entrance into the Holy of Holies were symbolical of the three Patriarchs, of the four wives of the Patriarchs, and of the twelve tribes. Only by depending upon the merits of these pious men and women might the high priest venture to enter the Holy of Holies without having to fear the angels that filled this space.
These were obliged to retreat upon the entrance of the high priest, and even Satan had to flee whenever he beheld the high priest, and did not dare to accuse Israel before God.