THEOSISCyrill of Alexandria
He adds a clarification regarding the similarity with Moses by stating: "According to all that thou didst ask of the Lord thy God on Mount Sinai on the day of the assembly, saying, Let us not continue to hear the voice of the Lord our God, neither let us look upon this great fire any longer, and let us not die." In reference to himself, he indicates that he was referred to as a mediator at that time because the assembly of the Israelites could no longer comprehend the heavenly revelation. Hence, they prudently declined what was beyond their capacity. This vision of God manifested itself through extraordinary phenomena and overwhelming sounds of trumpets.
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Consequently, Moses' mediation in delivering Divine commandments to the assembly served to aid the weaknesses of the Israelites at that time.
However, turning this analogy into reality, one can grasp the Mediator between God and humanity, Christ, who imparts to the obedient through the human voice—because He was born of a woman for our sake—the unfathomable will of God the Father, known solely to Him as He is considered the Son, possessing inherent Wisdom and the knowledge of "the depths of God" (1 Cor. 2:10). As it was impossible to behold with human eyes the pure, perfected, and incomprehensible glory of the Divine Essence—"for no man shall see My face," says God, "and live" (Ex. 33:20)—the only-begotten Word of God was necessary to assume our form, through the marvelous ways of Providence, donning a human body. He reveals to us the highest will of God and the Father, declaring, "All that I have heard from my Father, these things I declare to you" (John 15:15), and again, "For I did not speak from Myself, but the Father who sent Me—Himself gave Me a commandment what to say and what to speak" (Jn. 12:49).
Thus, even the ancient Moses, who faithfully relayed God's decrees to the people of Israel, can be seen as a precursor to Christ. While Moses' mediation was an official role, that of Christ is both free and profound, impacting both the humanity He mediates and God the Father.