"He was despised and rejected by others; a man of suffering and acquainted with infirmity; and as one from whom other hide their faces, he was despised and we held him of no account.
Surely he has born our infirmities and carried out diseases; yet we accounted him stricken, struck down by God, and afflicted. But he was wounded for our transgressions, crushed for our iniquities; upon him was the punishment that make us whole, and by his bruises we are healed.
All we like sheep have gone astray; we have all turned to our own way, and the Lord has laid on him the iniquity of us all." Isaiah 53:3-6
"'...for my eyes have seen your salvation, which you have prepared in the presence of all peoples, a light for revelation to the Gentiles and for glory to your people Israel'...Then Simeon blessed them and said to his mother Mary, 'This child is destined for the falling and the rising of many in Israel, and to be a sign that will be opposed so that the inner thought of many will be revealed--and a sword will pierce your own soul too.'"
Luke 2: 30-32, 34-35
The only thing that makes any sense of the evil and darkness in life, is that God sent his Son into this world to live and die as one of us, to be the bridge from God to a broken humanity. Only that singular sacrifice can take the shattered pieces of our broken lives and create something new and beautiful. And one day the scars, wounds and pain will be redeemed and "...we will be like him, for we will see him as he is." 1 John 3:2
And that is why we celebrate Christmas.