The day of Atonement is the Old Testament antecedent of Good Friday. The ram that is slaughtered for the sins of the people represents the spotless Lamb of God (so did, no doubt, that other—chosen by lot and burdened with the sins of the people—that was driven into the wilderness). And the high priest descended from Aaron foreshadows the eternal high priest.
Just as Christ anticipated his sacrificial death during the last supper, so he also anticipated the high priestly prayer. He did not have to bring for himself an offering for sin because he was without sin. He did not have to await the hour prescribed by the Law, nor to seek out the Holy of Holies in the temple.
He stands, always and everywhere, before the face of God; his own soul is the Holy of Holies. It is not only God’s dwelling but is also essentially and indissolubly united to God. He does not have to conceal himself from God by a protective cloud of incense. He gazes upon the uncovered face of the Eternal One and has nothing to fear. Looking at the Father will not kill him.
And he unlocks the mystery of the high priest’s realm. All who belong to him may hear how, in the Holy of Holies of his heart, he speaks to his Father; they are to experience what is going on and are to learn to speak to the Father in their own hearts.
Saint Edith Stein
The Prayer of the Church (excerpt)
Akademischen Bonifacius-Einigung, Paderborn (1936)
Stein, E. 2014, The Hidden Life: hagiographic essays, meditations, spiritual texts, translated from the German by Stein, W, ICS Publications, Washington DC.