From Aleteia:
St. Philip Neri was a holy priest during the 16th century who was widely known for his sanctity. After his death, the effectiveness of his ministry even gained him the title of “Second Apostle of Rome,” showing how much he positively influenced the city.
However, his activity did not go unnoticed by his fiercest enemy, the devil. Satan tried with all his might to tempt or scare St. Philip away from his apostolic activities. For example, Pietro Giacomo Bacci explains in his book The Life of Saint Philip Neri, “So bitter was the devil’s hatred to Philip, that whenever he prayed or performed any action at all of a religious nature, he almost always endeavored to disturb or annoy him.”