Jesus said " Write down these words, My daughter. Speak to the world about My Mercy; let all mankind recognize My unfathomable Mercy. It is a sign for the end times; after it , will come the day of justice. While there is still time, let them have recourse to the fount of My Mercy; let them profit from the Blood and water which gushed forth for them........ before I come as the just one, I first open wide the gates of My Mercy. He who does not pass through the gates of My Mercy must pass through the gates of justice.
Before I come as the just judge, I am coming first as the King of Mercy. Before the day of justice arrives, there will be given to people a sign in the heavens of this sort:
All light in the heavens will be extinguished, and there will be a great darkness over the whole earth. Then the sign of the cross will be seen in the sky, and from the openings where the hands and the feet of the Saviour were nailed will come forth great lights which will light up the earth for a period of time. This will take place shortly before the last day."
On a later occasion Our Lady appeared to St Faustina and said the following words: "I gave the Saviour to the world. As for you, you have to speak to the world about His great mercy and prepare the world for the Second Coming of Him who will come, not as a merciful saviour, but as a just Judge. O how terrible is that day! Determined is the day of justice, the day of divine wrath. The angels tremble before it. Speak to souls about this great mercy while it is still time for mercy. If you keep silent now, you will be answering for a great number of souls on that terrible day."