“Behold, the virgin shall be with child, and bear a Son, and they shall call His name Immanuel,” which is translated, “God with us.”
Matthew recorded this quote from Isaiah 7:14 as a fulfillment of a messianic prophecy. Isaiah’s words seem to have dual fulfillment, referring first to a sign to King Ahaz in Isaiah’s time, but finding ultimate fulfillment in the virgin birth of Jesus Christ.
Jesus Christ was human through His mother, but “was God” as the Son of God (John 1:1). When He “became flesh and dwelt among us” (John 1:14), He fulfilled the meaning of the name Immanuel, “God with us.”