St Faustina recounts…..
“I saw my Guadian Angel, who ordered me to follow him. In a moment I was in a misty place full of fire in which there was a great crowd of suffering souls.They were praying fervently, but to no avail, for themselves; only we can come to their aid. The flames which were burning them did not touch me at all. My guardian angel did not leave me for an instant.I asked these souls what their greatest suffering was. They answered me in one voice that their greatest torment was longing for God. I saw Our Lady visiting the souls in Purgatory.The souls call her “The Star of the Sea.” She brings them refreshment. I wanted to talk to them some more but my Guardian Angel beckoned me to leave.We went out of that prison of suffering.[I heard an interior voice] which said, “My mercy does not want it, but justice demands it”