23. Behold, a virgin--It should be "the virgin" meaning that particular virgin destined to this unparalleled distinction.
      shall be with child, and shall bring forth a son, and they shall call his name Emmanuel, which, being interpreted, is, God with us--Not that He was to have this for a proper name (like "Jesus"), but that He should come to be known in this character, as God manifested in the flesh, and the living bond of holy and most intimate fellowship between God and men from henceforth and for ever.

JFB.