22 All this took place to fulfil what the Lord had spoken by the prophet:(Matthew 1:22-25)*
23 “Behold, a virgin shall conceive and bear a son,
and his name shall be called Emman′u-el”
(which means, God with us). 24 When Joseph woke from sleep, he did as the angel of the Lord commanded him; he took his wife 25 but knew her not until she had borne a son; and he called his name Jesus.
St. John oppposes the old notion that Virgin Mary did not remain a virgin after giving birth to Jesus Christ.
“ The expression “until” need not lead you to believe that Joseph knew her subsequently; rather, it is used to inform you that the Virgin was untouched by man until the birth of Jesus. Scripture is accustomed to using the expression “until” without intending thereby to establish a limited period of time. . .. The evangelist uses this expression to establish what happened before the birth of Jesus, leaving it up to you to infer what happened afterward.” **John Chrysostom, Homily on Matthew 5, 3; PG 57, 58.
* Revised Standard Version
** Gambero, L., 1999. Mary and the Fathers of the Church 1st ed. Translated by Buffer, T., San Francisco: Ignatius Press.