For a child has been born for us,
    a son given to us;
authority rests upon his shoulders;
    and he is named
Wonderful Counselor, Mighty God,
    Everlasting Father, Prince of Peace. (Isaiah 9:6)

According to Handel’s Messiah it sounds…

A bit of Christmas to get our Holy Week started.  Physically speaking, the former was a requirement of the later.  Theologically speaking, His sacrifices at the the cross, the later were necessitated by His birth, the former.  That’s the hidden meaning behind Christmas.