Mary shares in her Son's redeeming mission. She experiences childbirth in a condition of extreme poverty: she cannot give the Son of God even what mothers usually offer a newborn baby; instead, she has to lay him "in a manger", an improvised cradle which contrasts with the dignity of the "Son of the Most High".
The Feast of the Nativity of Our Lord is an opportunity for each of us to evaluate how well we are incarnating God’s love. If we find that we are not the perfect image of God (that would be all of us!), then we must ask ourselves, “In what ways do I need to allow God to transform me into His image?” The answer usually falls into one of these three categories: fasting (making room for God), prayer (inviting Him in) and almsgiving (offering the blessings I receive—and myself—in love). This is why the Church wisely appoints this time of Advent in the liturgical year as a penitential period. In whatever way we observe this liturgical season, the important thing is to ensure that it is a time of preparation. We need to make room for God in order for Him to abide in us and transform us into Himself. In this way, we can each incarnate God’s love for all those we encounter.
If faith consists, in part, of a real encounter with God, then by making Him known through our own beings, we are bringing into the world the opportunity for faith. Jesus was born into the world in a stable—the most common and ordinary of places. We can bring Him into the world in the most ordinary of places too, such as a grocery store.