Moreover, since the enemy of our salvation was keeping a watchful eye on virgins, according to the prophecy of Isaiah, who said, Behold a virgin shall conceive and bare a Son and shall call His name Emmanuel, which is, being interpreted, ‘God with us Is. vii. 14; St. Matt. i. 23.,’ in order that he who taketh the wise in their own craftiness 1 Cor. iii. 19; Job v. 13.may deceive him who always glorieth in his wisdom, the maiden is given in marriage to Joseph by the priests, a new book to him who is versed in letters Is. xxix. 11.: but the marriage was both the protection of the virgin and the delusion of him who was keeping a watchful eye on virgins. But when the fulness of time was come, the messenger of the Lord was sent to her, with the good news of our Lord’s conception. And thus she conceived the Son of God, the hypostatic power of the Father, not of the will of the flesh nor of the will of man St. John i. 13., that is to say, by connection and seed, but by the good pleasure of the Father and co-operation of the Holy Spirit. She ministered to the Creator in that He was created, to the Fashioner in that He was fashioned, and to the Son of God and God in that He was made flesh and became man from her pure and immaculate flesh and blood, satisfying the debt of the first mother. For just as the latter was formed from Adam without connection, so also did the former bring forth the new Adam, who was brought forth in accordance with the laws of parturition and above the nature of generation.