i remember when we were studying dante in english , and ben gowan kept asking if the souls in purgatory ever got cast down into hell ( ben gowan once got suspended for three days for drawing a picture of a bomb blowing up our cafeteria and all of these decapitated heads flying everywhere , so for him the question was normal ) , and mrs. harbor went off on one of her tangents and said that no , that was n't possible , but that some modern christian thinkers believed you could go up from purgatory into heaven once you 'd done enough time there .