What are the references to purgatory in the Bible? Purgatory is defined in Roman Catholic doctrine as a place or experience of suffering for the souls of sinners who are absolving their sins before going to heaven. Furthermore, entrance into Heaven demands this momentary suffering due to sins whose guilt has not been forgiven. Catholic doctrine goes on to say that only those who die in the state of grace but have not yet undergone the punishment of their sin can be in purgatory. Therefore, no one in purgatory will stay there forever nor go to hell. Discover mentions of purgatory in the Bible from the collection of scripture quotes below!