Concerning the holy and much-lauded ever-virgin one, Mary, the Mother of God, we have said something in the preceding chapters, bringing forward what was most opportune, viz., that strictly and truly she is and is called the Mother of God. Now let us fill up the blanks. For she being pre-ordained by the eternal prescient counsel of God and imaged forth and proclaimed in diverse images and discourses of the prophets through the Holy Spirit, sprang at the pre-determined time from the root of David, according to the promises that were made to him. For the Lord hath sworn, He saith in truth to David, He will not turn from it: of the fruit of Thy body will I set upon Thy throne Ps. cxxxii. 11.. And again, Once have I sworn by My holiness, that I will not lie unto David. His seed shall endure for ever, and His throne as the sun before Me. It shall be established for ever as the moon, and as a faithful witness in heaven Ibid. lxxxix. 35, 36, 37.. And Isaiah says: And there shall come out a rod out of the stem of Jesse and a branch shall grow out of his roots Is. xi. 1..