Ambrose of Milan, on Gen 49:25

“The God of thy father shall be thy helper, and the Almighty shall bless thee with the blessings of heaven above, with the blessings of the deep that lieth beneath, with the blessings of the breasts and of the womb.”

“But why did she say: Blessed is the womb of your father and mother, if we want to understand the womb alone of Mary, the reason will be hidden. For she could have said it concerning the womb of the mother alone. But I think it is more beautiful to understand both the generation of the Lord Jesus according to the spiritual mystery, and according to divinity, and according to the flesh, because he was begotten from the Father before the ages. And the Father says: My heart has uttered a word; because it proceeded from that most intimate and incomprehensible substance of the Father, and it is always in Him. Therefore the evangelist also says: No one has ever seen God, except the only-begotten Son who is in the bosom of the Father, He has declared Him. Just as the spiritual bosom of the Father is understood as a certain inner secret of paternal love and nature, in which the Son is always present, so also the spiritual bosom of the Father is the womb, the secret of the innermost mystery, from which the Son has proceeded as though from a generative womb. Finally, we read in diverse ways, sometimes the womb of the Father, sometimes his heart from which he uttered a word, sometimes his mouth from which justice proceeded, from which wisdom came forth, as he himself says: From the mouth of the Most High, I came forth. Thus, just as we understand that generation from the Father, let us also understand the generation of Mary, the mother, when the womb of the mother is blessed, certainly the virginal womb of Mary, who gave birth to the Lord Jesus for us. Concerning which the Father says through the prophet Jeremiah: Before I formed you in the womb, I knew you; and before you came forth from the womb, I sanctified you. Therefore, the prophet declared the dual substance in Christ, of divinity and flesh: one from the Father, the other from the Virgin; in such a way, however, that he did not lack his divinity when he was born of the Virgin and was in the body.”

Imported from an open dataset — not yet checked against the printed edition.