Opening The Womb

Τὸ εἰρημένον ἐν τῇ θείᾳ Γραφῇ, ὅτι Πᾶν πρωτότοκον διανοϊψον μήτραν, ἅγιον τῷ Κυρίῳ, οὐ περὶ παντὸς εἴρηται πρωτοτόκου· μὴ οὕτως οἱ ἀμαθεῖς νομιζέτωσαν· ἀλλὰ περὶ ἑνὸς καὶ μόνον, τοῦ ἐν τῷ τίκτεσθαι τὴν μήτραν ἀνοιξαντο. Πᾶσαν γὰρ μήτραν μίξις καὶ συνουσία ἀνοίγνυσι· τὴν δὲ τὸν Κύριον ἡμῶν Ἰησοῦν Χριστὸν κυήσασαν, αὐτὸς συλληφθεὶς ἀσπόρως προερχόμενος ἤνοιξε, καὶ πάλιν ἐσφραγισμένην κατέλιπεν· ἀληθῶς μὲν γενόμενος ἄνθρωπος, ἀληθῶς δὲ Θεὸς καὶ προσκυνούμενος εἷς ἐξ ἀμφοτέρων τῶν φύσεων. Ἅγιος Ἰσίδωρος Του Πηλουσιώτου, Βιβίον Α', Ἐπιστολὴ ΚΓ' Θεοφιλῳ Migne PG 78. 196-197

When it is said in Sacred Scripture: 'Every firstborn that opens the womb shall be called holy to the Lord,' 1 this does not pertain to every firstborn, as uneducated men judge, but truly to that one who in birth alone opened the womb. For every womb is opened with laying together and embrace but she who bore our Lord Jesus Christ conceived without seed and He coming forth opened and again left her closed and sealed; truly being made man and truly God, the one worshipful in two natures. Saint Isidore of Pelusium, Book 1, Letter 23, To Theophilus 1 Exod 13.23, Lk 2.23