First off, a Blessed Christ Mass to all those faithful Catholics in attendance at Mass this holy day of obligation. Secondly, I pray for those separated brethren to reunite with the Catholic Faith their forefathers abandoned and instead of mere lip service to "Christmas" celebrate the Mass of Christ - the Christ Mass - which we celebrate in honor of His birth (which was likely not on December 25, see other article here).
We have just concluded the season of Advent, the first season of the liturgical year, which is a season of penance (similar to Lent) and one of anticipation of the coming Lord. We sing songs of hope and joy and anticipation - often of the Baby Jesus - but if we look at the readings in Mass, many of them are actually about the second coming of Christ! That is what we're in anticipation of now! Prepare ye the way of the Lord!
So why did God choose the Blessed Virgin Mary to be His Mother?
It starts with the fall of Adam and Eve, when they sinned - they brought upon all of us a fallen nature. Each of us inherits this fallen nature upon our conception. God requires a sacrifice in blood to atone for sins - and the victim must be spotless. Animal sacrifices of the Old Testament were insufficient for only a pure and spotless human could atone for the Original Sin. So in order for this to happen, God Himself would become Man. He would be born of a woman, as all men are, however we have this problem of Original Sin which all humans inherit - including this woman He would choose to become His Mother - so what to do? The first thing to do is this woman had to be made pure from the first moment of her conception - and at that moment all stain of Original Sin would be washed away. This is what happened to the Blessed Virgin Mary in the event we call the Immaculate Conception and this would be necessary so that the vessel or the "Ark of the New Covenant" would be worthy of carrying the Lord God, King of Kings within her. Now, she did inherit the temporal punishments of Original Sin - those of sorrow, suffering and death - and her Son would experience these punishments as well. Thus she was made pure - and her offspring was truly Man, and since she was already purified and "Full of Grace" (as the Angel of the Lord, Gabriel, addresses her in Luke 1:28 - which a few English translations have properly translated) her Son then was perfect and spotless - and thus worthy of becoming our Sacrifice to atone for all the sins of mankind, as only a truly spotless Sacrifice could do.
So, Christ the Lord was born on that first Christ Mass Day - which of course would not be called that until first Christ Himself established the Mass on the first Holy Thursday in the week of His Passion - and later still, until the Church He Himself established would declare a day for celebrating His birth - and we celebrate His birth with the Sacrifice of the Mass, which truly is the reason for which He was born. He was born to become our Sacrifice for all time, and that Sacrifice is perpetuated in the Mass which He established.
Again, it is my prayer that our separated brethren return to full communion with the Church abandoned by their forefathers- for Jesus Christ explicitly expressed His desire, that we be ONE, just as He and the Father are One.
And not for them only do I pray, but for them also who through their word shall believe in me; that they all may be one, as thou, Father, in me, and I in thee; that they also may be one in us; that the world may believe that thou hast sent me. (DRB)
Join us in the Oneness which we once had and He so desires for us.
And if there was social networking when Jesus was born...