3. Thus shall Aaron come into the holy place. The rites and formality are now described; first, that Aaron should put on the holy garments, and wash his person; secondly, that he should offer a bullock and ram for a burnt-offering; thirdly, that he should take two goats from the people, one of which should be sent away alive, and the other slain in sacrifice. We have stated elsewhere why the priests were to be dressed in garments different from others, since he who is the mediator between God and men should be free from all impurity and stain; and since no mortal could truly supply this, a type was substituted in place of the reality, from whence believers might learn that another Mediator was to be expected; because the dignity of the sons of Aaron was only typical, and not true and substantial. For whenever the priest stripped himself of his own garments, and assumed those which were holy and separated from common use, it was equivalent to declaring openly that he represented another person. But if this symbol were not sufficient, the ablution again taught that none of the sons of Aaron was the genuine propitiator; for how could he purify others, who himself required purification, and made open confession of his uncleanness? A third symbol also was added; for he who by a sacrifice of his own atoned for himself and his house, how was he capable of meriting God’s favor for others? Thus then the holy fathers were reminded, that under the image of a mortal man, another Mediator was promised, who, for the reconciliation of the human race, should present Himself before God with perfect and more than angelical purity. Besides, in the person of the priest there was exhibited to the people a spectacle of the corruption whereby the whole human race is defiled, so as to be abominable to God; for if the priest, both chosen by God, and graced with the sacred unction, was still unworthy on the score of his uncleanness to come near the altar, what dignity could be discoverable in the people? And hence to us now-a-days also very useful instruction is derived; viz., that when the question arises how God is to be propitiated, we are not to look this way and that way; since out of Christ there is no purity and innocence which can satisfy the justice of God.