More from Augustine on what this feast means

What man knows all the treasures of wisdom and knowledge hidden in Christ, concealed in the poverty of his flesh? . . . How great are the blessings of his goodness which he reserves for those who fear him and shows to those who hope in him? Until he gives them to us in their plenitude, we can have only the faintest conception of them . . . from a sermon by St. Augustine, bishop

No matter how much we think we know God, on this earth we remain mortal, finite beings trying to understand the eternal, infinite maker of all things. We try to understand God's love and God's motives in terms of our own, because we have been told that we are made in his image and likeness, and yet our limited time, knowledge and power and our profound selfishness fundamentally distort our experience of love. Thus we reject God because he doesn't do what we think we would do if we were endowed with infinite love, knowledge and power, and if we were unbound by time as God is. If we consider more closely the things that we say we would do (better, of course) in God's place, our stated choices would invariably contravene the free will which he has bestowed on us, unhindered by any fear of us and motivated by a love for us which is greater than we can understand.

. . . but to enable us to receive them, he who in his divine is the equal of the Father assumed the condition of a slave and became like us, and so restored to us our likeness to God. The only Son of God became son of man to make many men sons of God.  

And, again, St. Augustine leads us to the true miracle of Christmas. Too often we focus on the manger, shepherd, angels and wise men, and fail to consider what it means for the eternal Son to become a mortal son. That may be best. Even the most faith-filled mind struggles to understand how such a thing can be. But let us not forget the reason: not just a baby born two thousand years ago, but our own adoption and transformation into what would otherwise always be beyond us.