I recently read an article about a Sister Seraphine who supposedly had visits from her father who was in purgatory. This was in the Housetops magazine. She said her father appeared to her in a cistern of fire. He also told her that her 8 year old sister who had died had also been in Purgatory for 6 years. I have always understood that Purgatory was a place of purification but the purification would be in the form of longing to be with God and not being able to be with him. What is the official teaching of the Catholic Church on Purgatory?