Is this not the most wonderful prayer, after the "Our Father?" . . .

The Key Which Opens the Doors

O my holy Lady, Mother of God, full with grace, you, the Glory of our nature, the Channel of all goods, the Queen of all things after the Holy Trinity… the Mediatrix of the world after the Mediator. You, the mysterious Bridge which connects the earth to Heaven, the Key which opens the doors of paradise for us. Our Advocate, our Mediatrix, look at my faith, look at my pious desires and remember your power and mercy. Mother of the One who is true mercy and goodness, receive my heart in its misery and, by your intercession, make me worthy to be on the right-hand side of your only Son one day. Amen.

St Ephrem the Syrian (306 - 373)