So all this was done that it might be fulfilled which was spoken by the Lord through the prophet, saying: "Behold, the virgin shall be with child, and bear a Son, and they shall call His name Immanuel," which is translated, "God with us."
Matt 1:20-23 NKJV
What does behold mean? It seems to be from the language of angels and prophets. You don't find this phrasing in the newer translations of the Bible, but if you were brought up on Charlie Brown's Christmas you may remember hearing it in the famous lines of Linus, when he reads the Christmas story: "And the angel said unto them, Fear not: for, behold, I bring you good tidings of great joy, which shall be to all people.For unto you is born this day in the city of David a Saviour, which is Christ the Lord." (Luke 2:10-11 KJV)
In the Bible this word is used as an imperative, an order to pay attention. When a prophet or angel says, "Behold!" our ears should perk up because an important message is being delivered. Stop in your tracks, look up from your hurrying and scurrying to get ready for Christmas. Listen! Hark, the Herald Angels Sing! A Proclamation has been made. I for one feel compelled to Fall on my Knees. Christ has come, so come let us adore Him. Put down that wrapping paper and listen, He is calling to you and to me, Sinner, come home!
Behold! See! Worship the Newborn King!