Therefore the Lord himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel.
All Commentaries on Isaiah 7:14 Go To Isaiah 7
Theophylact of Ochrid
AD 1107
The Jews say that it is not written in the prophecy “virgin” but “young woman.” To which it may be answered that “young woman” and “virgin” mean the same thing in Scripture, for in Scripture “young woman” refers to one who is still a virgin. Furthermore, if it was not a virgin that gave birth, how would it be a sign, something extraordinary? Listen to Isaiah, who says, “For this reason the Lord himself shall give you a sign,” and immediately he adds, “Behold, the virgin.” So if it were not a virgin that would give birth, it would not be a sign. The Jews, then, alter the text of Scripture in their malice, putting “young woman” instead of “virgin.” But whether the text reads “young woman” or “virgin,” it should be understood in either case that it is a virgin who will give birth so that the event may be a miraculous sign.