 After he saw this vision and the people, the priests and others who were there, he was like in a catatonic state for a few minutes. He was so shaken by this. So he asked for a pen and some paper. And then in there, he wrote the original version anyway of the St. Michael the Archangel prayer. And he shortly after that mandated that it be prayed after mass in all the Catholic churches in the whole world as a way to offset the damage that the devil would do.