Appearances and Truth

Ἤδει μὲν ἡ παναγία Παρθένος, μὴ τέκνον αὐτὸν εἴναι τοῦ Ἰωσὴφ, ἀλλ' εἰς πρόσωπα τούτων τὸν ἑαυτης ἐγκρίνει μνηστῆρα διὰ τὴν τῶν Ἰουδαίων ὑποψίαν, οἰομένων αὐτὸν ἐκ πορνείας γεγεννῆσθαι. Ἀπλούστερον μὲν οὖν λέγοιτο ἂν, ὅτι ἐτίμησεν αὐτὸν τὸ Πνεῦμα τὸ ἅγιον τῇ τοῦ πατρὸς προσηγορίᾳ καὶ τὰ λοιπά ..., μήπως αὐτοὺς καταλέλοιπεν. Ὁ δὲ Κύριος, ἀφεὶς ἀνθρωπίνην δοῦναι ἀποκρισιν, θείαν δίδωσι, παρεμφαίνων, ὅτι Θεὸς εἴη σεσαρκωμένος. Ὠριγένης, Εἰς Το Κατα Λουκαν Εὐαγγελιον, Κεφ Α'  Source: Migne PG 17.329c

The all blessed Virgin knew that He was not the son of Joseph, but in public she took a spouse on account of the suspicion of the Jews, that they would not think Him born of fornication. More openly, then, it may be said that the Holy Spirit may be honoured with the name of father ... lest He had forsaken them. But the Lord, when He might give a human answer, rather in a Divine fashion gives it, revealing that God may be incarnated. Origen, Commentary On Luke, Chap 1, Fragment