St. Justin (100 - 165)
Dialogia contra Trypho, Chapter 84
"Moreover, the prophecy, 'Behold, the virgin shall conceive, and bear a
son,' was uttered respecting Him. For if He to whom Isaiah referred was
not to be begotten of a virgin, of whom did the Holy Spirit declare,
'Behold, the Lord Himself shall give us a sign: behold, the virgin shall
conceive, and bear a son?' For if He also were to be begotten of sexual
intercourse, like all other first-born sons, why did God say that He would
give a sign which is not common to all the first-born sons?
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100-165
Fathers and Doctors of the Church through History