I can’t sleep. I might as well be useful. So I propose to you that the Rosary is a very Trinitarian prayer:
1.) It begins (and ends) with the Sign of the Cross, which invokes the Father, the Son, and the Holy Ghost.
2.) Next comes the Apostles’ Creed, which professes our belief in the Father, the Son, and the Holy Ghost.
3.) The first prayer, properly speaking, is the Our Father, and every decade begins with the Our Father. We address this prayer to the Father, having been adopted as co-heirs of the Son through the outpouring of the Holy Ghost.
4.) Every Hail Mary references the Holy Ghost implicitly and the Son explicitly. “The Lord is with thee”—the Holy Ghost overshadows the Blessed Virgin Mary. “Blessed is the fruit of thy womb, Jesus”—the Son is incarnate of the Blessed Virgin.
5.) After each decade comes the doxology, “Glory be to the Father, and to the Son, and to the Holy Ghost.”
6.) The first Joyful Mystery, the Annunciation, entails the overshadowing of the Holy Ghost and the Incarnation of the Son.
7.) All of the Joyful and Sorrowful Mysteries and the first two Glorious Mysteries directly concern God the Son.
8.) The third Glorious Mystery, Pentecost, directly concerns God the Holy Ghost.
9.) The fourth and fifth Glorious Mysteries, the Assumption and the Crowning of Our Lady as Queen of Heaven and Earth, concern Our Lady’s return to the Father.
10.) Our Lady is a human creature, hence our sister and our neighbor, but she is also perfectly initiated into the relations of the Holy Trinity. She is the daughter of God the Father, the Mother of God the Son (a dogma affirmed in the Apostles’ Creed itself), and the Spouse of God the Holy Ghost. *That* is why she is Our Mother and Our Lady, the Blessed (=fruitful, fecund) Virgin, Mediatrix of All Graces won by her Son, Co-Redemptrix, and Advocatrix, deserving of hyperdulia.
The Rosary thus allows us to fulfill the two great commandments in a Trinitarian way. We show our love and adoration for the Triune God, as well as our love for our neighbor (the Blessed Virgin Mary) as perfected and immersed within the interpersonal, relational love of the Trinity.