Turn to any page of St. Faustina’s Diary and you’ll find spiritual gems. Like this one:

Jesus looked at me and said, Souls perish in spite of My bitter Passion. I am giving them the last hope of salvation; that is, the Feast of My Mercy. If they will not adore My mercy, they will perish for all eternity. Secretary of My mercy, write, tell souls about this great mercy of Mine, because the awful day, the day of My justice, is near (Diary, 965).

My daughter, all your miseries have been consumed in the flame of My love, like a little twig thrown into a roaring fire. By humbling yourself in this way, you draw upon yourself and upon other souls an entire sea of My mercy. (Diary 178).