John Chrysostom
Catena Aurea · Lukasevangelium 1
Then said Mary unto the angel, How shall this be, seeing I know not a man? And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.
(Hom. 49 in Gen.) As if he said, Look not for the order of nature in things which transcend and overpower nature. Dost thou say, How shall this be, seeing I know not a man? Nay rather, shall it happen to thee for this very reason, that thou hast never known a husband. For if thou hadst, thou wouldest not have been thought worthy of the mystery, not that marriage is unholy, but virginity more excellent. It became the common Lord of all both to take part with us, and to differ with us in His nativity; for the being born from the womb, He shared in common with us, but in that He was born without cohabitation, He was exalted far above us.