Now all this took place that what was spoken by the Lord through the prophet might be fulfilled, saying, “BEHOLD, THE VIRGIN SHALL BE WITH CHILD, AND SHALL BEAR A SON, AND THEY SHALL CALL HIS NAME IMMANUEL,” which translated means, ” GOD WITH US.” And Joseph arose from his sleep, and did as the angel of the Lord commanded him, and took her as his wife, and kept her a virgin until she gave birth to a Son; and he called His name Jesus (Matthew 1:22-25).
When Joseph learned of Mary’s pregnancy prior to the consummation of their marriage, his first thought was to “divorce” her privately. (In that society an engagement was as binding as a marriage, so the term “divorce” is appropriate.) Much has been made, properly, about Joseph’s integrity in that he did not desire to damage her reputation any more than it already had been or would be damaged through the pregnancy prior to their consummation. So the angel had to meet him in a dream to prevent this.
Matthew included this incident in his Gospel to demonstrate the fulfillment of the prophecy from Isaiah concerning the virgin birth of the Messiah. It was a well-known prophecy and needed to be documented if the Jewish people were to believe that Jesus really was Messiah.
Prognosticators in various fields — meteorology, economics, as well as religion — look for signs to determine the validity of a phenomenon. The National Weather Service has studied the weather conditions just prior to significant weather events so they can warn us when similar conditions exist. In the aftermath of a storm they will dispatch analysts to determine if a fallen tree or structure was the result of straight-line winds or the twisting of a tornado. Investment counselors observe the political and economic conditions when the stock market rises and falls to make the wisest decisions concerning our retirement funds. The religious prognosticators tend to be less accurate because the Scripture they consult was written in cultures and languages far different from our own.
Matthew is doing the same in this context. The phenomenon of Jesus’ ministry, especially His death and Resurrection begged the question, “Is/Was He the predicted Messiah?” Accuracy in assessing this was vital because the hope of the Jewish nation was at stake. If He were not the Messiah, they must continue to watch for someone else to fulfill the prophecies; if he were the Messiah, He was the King and needed to be obeyed.
Although the Messiah was predicted to come through Jewish ethnicity, He was not a Savior only to the Jews. Prophecies are abundant that describe His desire that ALL nations come to Him. Still, the evidence that Matthew drew together in his Gospel for his Jewish audience makes it clear that Jesus of Nazareth is the Messiah predicted by the ancient prophets of Israel. Therefore if a man rejects Him as Messiah, he must reject the Scriptures (or at least Matthew’s Gospel) as having any authority.