Now at the beginning of this pilgrimage, the faith of Mary meets the faith of Joseph. If Elizabeth said of the Redeemer’s Mother, “blessed is she who believed,” in a certain sense this blessedness can be referred to Joseph as well, since he responded positively to the word of God when it was communicated to him at the decisive moment. While it is true that Joseph did not respond to the angel’s “announcement” in the same way as Mary, he “did as the angel of the Lord commanded him and took his wife.” What he did is the clearest “obedience of faith” (cf. Rom 1:5; 16:26; 2 Cor 10:5-6).
One can say that what Joseph did united him in an altogether special way to the faith of Mary. He accepted as truth coming from God the very thing that she had already accepted at the Annunciation. (from Guardian of the Redeemer)