Turn to any page of St. Faustina's Diary, and you'll find spiritual gems, like this one:
Today, I begin a new assignment. I go from the garden to the desert of the gate. I went in to talk to the Lord for a while. I asked Him for a blessing and for graces to faithfully carry out the duties entrusted to me. I heard these words: My daughter, I am always with you. I have given you the opportunity to practice deeds of mercy which you will perform according to obedience. You will give Me much pleasure if, each evening, you will speak to Me especially about this task. I felt that Jesus had given me a new grace in relation to my new duties; but, despite this, I have locked myself deeper in His Heart (Diary, 1267).