Not All Is Merry and Bright

For thousands of years the world has been broken. Misery, darkness, and the work of Satan are firmly entrenched. The song O Holy Night has a line which sums this up perfectly. :Long lay the world in sin and erroe oining till He appeared, and the soul felt its worth." Just what does the birth of Christ show us? How can events from so long ago understand our condition of brokenness today?