The coming of the Messiah, foretold by the Prophets, is qualitatively the most important event of all history, on which it confers its ultimate and full meaning. It is not historical and political coordinates that condition God's choice, but on the contrary, the event of the Incarnation that "fills" history with value and meaning.
We, who come 2,000 years after that event, can affirm this, so to speak, also a posteriori, after having known the whole life of Jesus, until his death and Resurrection. We are witnesses at the same time of his glory and his humility, of the immense value of his coming and of God's infinite respect for us human beings and for our history.
He did not fill time by pouring himself into it from on high, but "from within", making himself a tiny seed to lead humanity to its full maturation.
from the Pope's New Year's Eve Homily
hat-tip The CIN Blog