"Behold, a virgin shall be with child, and shall bring forth a son, and they shall call his name Emmanuel, which being interpreted is, God with us."
As God was literally with Mary and Joseph, and the rest of the New Testament Bible characters through the incarnate Son, so He truly is with us today. He will always be with us. As we serve Him, His presence will always be with us. Matthew 28:20 says: "I am with you alway, even unto the end of the world. Amen." Truly the Lord Jesus is Emmanuel.