As you have already listened to Moses and Isaiah, listen now to Jeremiah teaching the same truth as they did: This is our God, and no other shall be compared to Him, Who has found out the whole way of knowledge and has given it to Jacob His servant and to Israel His beloved.⁠a Afterward He showed Himself on earth and lived among men. For earlier he had said, And He is Man, and Who shall know Him? So you have God seen on earth and living among men. Now I ask you what sense you would give to No one has seen God at any time, except the Only-begotten Son, Who is in the bosom of the Father, when Jeremiah proclaims God seen on earth and living among men? The Father admittedly cannot be seen except by the Son; Who then is This who was seen and lived among men? He must be our God, for He is God visible in human form, Whom men can touch. And take to heart the prophet's words, No other shall be compared to Him. If you ask how this can be, listen to the rest of the sentence, so that you are not tempted to deny the Father His share in the confession. Hear, O Israel, the Lord your God is One. The whole passage is, No one shall be compared to Him, Who has found out the whole way of knowledge and has given it to Jacob His servant and to Israel His beloved. Afterward He showed Himself on earth and lived among men. For there is one Mediator between God and Men, Who is both God and Man; Mediator both in the giving of the Law and in the taking of our body. Therefore no other can be compared to Him, for He is One, born from God into God, and He is the One through Whom all things in heaven and earth were created, through Whom times and worlds were made. In short, everything that exists owes its existence to His action. He is the One Who instructs Abraham, Who speaks with Moses, Who testifies to Israel, Who dwells in the prophets, Who was born through the Virgin from the Holy Spirit, Who nails to the cross of His passion the powers that are our enemies, Who kills death in hell, Who strengthens the assurance of our hope by His Resurrection, Who destroys the corruption of human flesh by the glory of His Body. Therefore no one shall be compared to Him. For these are the distinctive powers of God the Only-begotten; He alone was born from God, the blessed Possessor of such great prerogatives. No second god can be compared to Him, for He is God from God, not born from any alien being. Nothing new or strange or recent is created in Him. When Israel hears that its God is one, and that no second god, whom men might consider God, is compared to God Who is God's Son, the revelation means that God the Father and God the Son are altogether One, not by confusion of Person but by unity of substance. For because God the Son is God, the prophet forbids us to compare Him to some second deity.