During Advent the Church celebrates the longing to see God’s Face, together with the Blessed Virgin Mary, with a Triduum (three days of prayer beginning on December 15) and a Feast (on December 18th)–It is called The Feast of the Expectation of the Blessed Virgin Mary, Longing to See His Face.  (a bit of the history may be found here.) The prayer may also be continued  until Christmas.

Prayer for the Triduum and Feast of the Expectation of the Blessed Virgin Mary, Longing to See His Face

“Mary, your life with Jesus was one of the purest, most fervent, most perfect emotions of longing and most eager expectation of the Birth of the Divine Child! How great must have been that longing!  You were longing to see the Face of God and to be happy in the vision.  You were soon really to see the Face of God, the created image of divine perfection, the sight of which rejoices heaven and earth, from which all being derive life and joy; the Face whose features enraptured God from all eternity, the Face for which all ages expectantly yearned.  You were to see this Face unveiled, in all the beauty and grace as the face of your own child. 

Most just indeed it is, O Holy Mother of God, that we should unite in that ardent desire which you had to see Him, who had been concealed for nine months in your chaste womb; to know the features of this Son of the heavenly Father, who is also your own; to come to that blissful hour of His birth, which will give glory to God in the highest, and on earth, peace to men of good will.  Yes, dear Mother, the time is fast approaching, though not fast enough to satisfy your desires and ours.  Make us re-double our attention to the great mystery; complete our preparation by your powerful prayers for us, so that when the solemn hour has come, our Jesus may find no obstacle to His entrance into our hearts.  Amen.” (Prayer by Rev. Lawrence Lovasik, S.V.D.)