The mystery of Christmas therefore lays upon us all a debt and an obligation to the whole created universe. We who have seen the light of Christ are obliged, by the greatness of the grace that has been given us, to make known the presence of the Saviour to the ends of the earth. This we will do not only by preaching the glad tidings of His coming, but above all by revealing Him in our lives. Christ is born to us today, in order that he may appear to the whole world through us. This one day is the day of His birth, but every day of our mortal lives must be His manifestation, His divine Epiphany, in the world which He has created and redeemed.
Thomas Merton
Seasons of Celebration