8 The Catholic Encyclopedia summarizes the teaching: The souls of those who have died in the state of grace suffer for a time a purging that prepares them to enter heaven....The purpose of purgatory is to cleanse one of imperfections, venial sins, and faults, and to remit or do away with the temporal punishment due to mortal sins that have been forgiven in the Sacrament of Penance. It is an intermediate state in which the departed souls can atone for unforgiven sins before receiving their final reward....”Purgatorial