In every engagement with the infernal powers, we shall always certainly conquer by having recourse to the Mother of God, Who is also our Mother, saying and repeating again and again: "We fly to thy patronage, O holy Mother of God: we fly to thy patronage, O holy Mother of God." Oh how many victories have not the faithful gained over hell, by having recourse to Mary with this short but most powerful prayer! Thus is was that the great servant of god, Sister Mary Crucified, of the Order of St. Benedict, always overcame the devils.
St. Alphonsus Liguori in Hail Holy Queen!
Further reading
This passage expresses St. Alphonsus Liguori's confidence in Mary's maternal care. His The Glories of Mary offers a longer exploration of Marian devotion for readers who want to continue reflecting on that theme.
The Glories of Mary by St. Alphonsus Liguori (paperback) on Amazon (paid link)