On October 13, 1884, after Pope Leo XIII had finished celebrating Mass in the Vatican Chapel, attended by a few Cardinals and members of the Vatican staff, he suddenly stopped at the foot of the altar. He stood there for about 10 minutes, as if in a trance, his face ashen white. Then, going immediately from the Chapel to his office, he composed the prayer to St. Michael, with instructions it be said after all Low Masses everywhere. When asked what had happened, he explained that, as he was about to leave the foot of the altar, he suddenly heard voices - two voices, one kind and gentle, the other guttural and harsh. They seemed to come from near the tabernacle. As he listened, he heard the following conversation:
The guttural voice, the voice of Satan in his pride, boasting to Our Lord:
"I can destroy your Church"
The gentle voice of Our Lord:
"You can? Then go ahead and do so."
"To do so, I need more time and more power."
"How much time? How much power?
"75 to 100 years, and a greater power over those
who will give themselves over to my service."
"You have the time, you will have the power.
Do with them what you will."
The Leonine Prayer
Ave Maria, gratia plena, Dominus tecum, benedicta tu in mulieribus et benedictus fructis ventris tui, Jesus. Sancta Maria, Mater Dei, ora pro nobis peccatoribus, nunc et in hora mortis nostrae. Amen. (Said 3 times)
Salve Regina, Mater misericordiae, vita, dulcedo, et spes nostra, salve. Ad te clamamus, exsules filii Evae. Ad te suspiramus gementes et fientes in hac lacrymarum valle. Eia ergo, Advocata nostra, illos tuos misericordes oculos ad nos converte. Et Jesum, benedictum fructum ventris tui, nobis, post hoc exilium, ostende. O clemens, o pia, o dulcis Virgo Maria. Ora pro nobis, sancta Dei Genitrix. Ut digni efficiamur promissionibus Christi.
Oremus. Deus, refugium nostrum et virtus, populum ad te clamantem propitius respice; et intercedente gloriosa, et immaculata Virgine Dei Genitrice Maria, cum beato Joseph, ejus Sponso, ac beatis Apostolis tuis Petro et Paulo, et omnibus Sanctis, quas pro conversione peccatorum, pro libertate et exaltatione sanctae Matris Ecclesiae, preces effundimus, misericors et benignus exaudi. Per eundum Christum Dominum nostrum. Amen.
Sancte Michael Archangele, defende nos in proelio; contra nequitiam et insidias diaboli esto praesidium. Imperet illi Deus, supplices deprecamur: tuque, Princeps militiae Caelestis, satanam aliosque spiritus malignos, qui ad perditionem animarum pervagantur in mundo, divina virtute in infernum detrude. Amen.
Cor Jesu sacratissimum. Miserere nobis. Cor Jesu sacratissimum. Miserere nobis. Cor Jesu sacratissimum. Miserere nobis.