6.
But what Isaiah said, "From the height above, or from the depth beneath," 1 was meant to indicate, that "He who descended was the same also who ascended." 2 But in this that he said, "The Lord Himself shall give you a sign," he declared an unlooked-for thing with regard to His generation, which could have been accomplished in no other way than by God the Lord of all, God Himself giving a sign in the house of David. For what great thing or what sign should have been in this, that a young woman conceiving by a man should bring forth,--a thing which happens to all women that produce offspring? But since an unlooked-for salvation was to be provided for men through the help of God, so also was the unlooked-for birth from a virgin accomplished; God giving this sign, but man not working it out.
