The Angel had said to the shepherds: "This will be a sign for you: you will find a babe wrapped in swaddling clothes and lying in a manger" (Lk 2:12; cf. 2:16). God's sign, the sign given to the shepherds and to us, is not an astonishing miracle. God's sign is his humility. God's sign is that he makes himself small; he becomes a child; he lets us touch him and he asks for our love. How we would prefer a different sign, an imposing, irresistible sign of God's power and greatness! But his sign summons us to faith and love, and thus it gives us hope: this is what God is like. He has power, he is Goodness itself. He invites us to become like him. Yes indeed, we become like God if we allow ourselves to be shaped by this sign; if we ourselves learn humility and hence true greatness; if we renounce violence and use only the weapons of truth and love.
Origen, taking up one of John the Baptist's sayings, saw the essence of paganism expressed in the symbol of stones: paganism is a lack of feeling, it means a heart of stone that is incapable of loving and perceiving God's love. Origen says of the pagans: "Lacking feeling and reason, they are transformed into stones and wood" (in Lk 22:9). Christ, though, wishes to give us a heart of flesh. When we see him, the God who became a child, our hearts are opened. In the Liturgy of the holy night, God comes to us as man, so that we might become truly human. Let us listen once again to Origen: "Indeed, what use would it be to you that Christ once came in the flesh if he did not enter your soul? Let us pray that he may come to us each day, that we may be able to say: I live, yet it is no longer I that live, but Christ lives in me (Gal 2:20)" (in Lk 22:3).
Lord Jesus Christ, born in Bethlehem, come to us! Enter within me, within my soul. Transform me. Renew me. Change me, change us all from stone and wood into living people, in whom your love is made present and the world is transformed. Amen.
Yes, yes, it is a month or so late, but this excerpt from Pope benedict XVI's midnight mass homily holds up pretty well year round.