Lord, have mercy. Christ, have mercy. Lord, have mercy. Immaculate Mary, meek and humble of heart. Conform our hearts to the heart of Jesus. Let us pray: O most merciful God, who for the salvation of ...

through the sorrowful and immaculate heart of mary, your and our tender mother. Pray the Hail Holy Queen, and add: St. Joseph, foster father of Jesus, pray for us.

Affirming the constant faith of the Church, he expressed in that definition, the exact meaning of the truth of Mary's Immaculate Conception: that she was conceived free from the stain of original sin.