To me, Christmas is more than just birth of Christ. It is his whole sacrifice of coming from glory to human form and then, not just to die, but to rise and go back to glory having made payment for our sins.

THE SHADOW OF A CROSS

The shadow of a cross
across a manger lay
where God became a man
to bear that cross someday.

The shadow of the cross
speaks life to sinful men.
The innocent would pay
the price for all our sin.

The shadow of that cross
became reality
when God himself had died
so man would now be free.