"For unto us a Child is born." - Isaiah 9:6
Taking all of verse 6 and all of Isaiah thus far in context, this can only apply to one who is God incarnate. Just one for instance, His name will be called "...Mighty God."
This verse must point to the coming and promised Messiah, the great Son of David, and He will be both God and man.
Webb notes as well that it is wonderful to meditate on the whole of chapters 7-9 where purpose of God in history is associated with the birth of babies, of little children. "Out of the mouth of babes" comes the declaration of the salvation of the world. His strength is made perfect in weakness; and there, in a manger, lies the power of all powers.