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
Augustine of Hippo
AD 430
You must appreciate, brothers and sisters, what a tremendous desire possessed the saints of old to see the Christ. They knew he was going to come, and all those who were living devout and blameless lives would say, “Oh, if only that birth may find me still here! Oh, if only I may see with my own eyes what I believe from God’s Scriptures!” The saints who knew from the holy Scripture that a virgin was going to give birth as you heard when Isaiah was read: “Behold, a virgin shall conceive in the womb and shall bear a son, and his name shall be called Emmanuel.” What Emmanuel means the Gospel declares to us, saying, “which is interpreted, God with us.” So do not let it surprise you, unbelieving soul, whoever you are, do not let it strike you as impossible that a virgin should give birth, and in giving birth remain a virgin. Realize that it was God who was born, and you will not be surprised at a virgin giving birth. So then, to prove to you how the saints and just men and women of old longed to see what was granted to this old man Simeon, our Lord Jesus Christ said, when speaking to his disciples, “Many just men and prophets have wished to see what you see and have not seen it; and to hear what you hear and have not heard it.”