Isaiah 9:6,7

The last and greatest cause of joy is the birth of the Messiah and his wonderful character and government. When Isaiah expected the event to take place, cannot be gathered from this prophecy. There is no reason for supposing that the reference is to a child already born; the perfect tense is used, as throughout the passage, from the ideal standpoint of the writer, which is within the Messianic age. The birth of the child is most naturally conceived as taking place in the age of miracle which succeeds the overthrow of the Assyrian; hence no part is assigned to him in effecting the national emancipation.