The way I understood purgatory - and maybe you've got a different version - but in Chicago in the '70s, the idea was it was like detention. You had screwed up and you go over there in purgatory and you sit there until the end of days and then we'll decide. You'd made your mistake, and you were in prison, and it's not terrible and it's not great, and you feel a little crappy because you were not in the presence of God.