When demons showed up, St. Faustina knew what to do.

Saint Faustina wrote:"Our meals shall be such that not even the poor will have any reason to envy us" (546). So, it's no surprise that St. Faustina didn't eat meat on Fridays even outside of Lent. That was Canon Law. But since St. Faustina's time, Canon Law has allowed us, depending on our bishops conferences, to choose another penance on Fridays in place of abstaining from meat. The United States Conference of Catholic Bishops allow a substitute penance. Nevertheless, the USCCB gives "first place to abstinence from flesh meat" (24, Pastoral Statement on Penance and Abstinence)

Turn to any page of St. Faustina's Diary, and you'll find spiritual gems. Like this one:My daughter, have fear of nothing; I am always with you. All your adversaries will harm you only to the degree that I permit them to do so. (431)