Through God’s self-communicating love we are made into the likeness of the Divine Savior and bear his image.  According to St. Paul of the Cross, people have the duty to be ready, by means of interiorization and of trust, for the efficient action of this divine nativity.  This sequence of thought is evident in the following excerpt from a letter of January 1, 1770: ~taken from Chapter 5 of The Mysticism of the Passion in St. Paul of the Cross by Martin Bialas, CP

. . . I desire that you be born anew, each day, in the divine incarnate Word to a completely holy life and, in this way, to become a living retreat of Jesus Christ.  All this will happen if you are faithful and remain in your own interior hermitage, resting your spirit in the divine bosom of the heavenly Father, where this divine nativity is celebrated each moment.  In this manner, you will always be celebrating Christmas in the little stable of your spirit. ~Paul of the Cross' letter to Bartholomew Calderoni (8th letter on January 1, 1770 in Vol. 3 on Page 552 for Paul's Letter 1872)