In his book Science and the Trinity: The Christian Encounter with Reality John Polkinghorne in effect defends the idea of Purgatory – though a different sort of Purgatory (I’ll get to that). He begins with the observation that science shows us that God is patient, working through processes that can take immense amounts of time, and not often in sudden dramatic interventions – and even when He does dramatic interventions they are part of a plan that covers generations. Then he notes that just because we go from an old creation to a new one God isn’t going to change His patience or His love, that these will continue.
Thus to Purgatory: not the traditional place of torment for sins to burn them out, but a place of hope where ‘souls’ can strive to gain more and more of the Light. He invokes the Mount of Purgatory from Dante’s Purgatorio, where sinners work their way up the mountain towards heaven with angels cheering them on, striving upward in the knowledge that they cannot slip backwards.
I find this a definitely more positive view of Purgatory. The doctrine has often been defended with Paul’s assertion that some will be saved “as through fire”, but as some have pointed out in this forum that’s a tenuous connection. The doctrine is built more on the idea that we must be pure to gain heaven and that God in His mercy will make that possible for believers who are “not up to par”, and on the idea that God is vengeful and enjoys punishing people. But God is love, and if there is some sort of Purgatory w should expect it to be loving, not vindictive.
Anyway . . . . all ye science types and others, comments?