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I caught the last few minutes on the radio of the television program NewsHour with Jim Lehrer. There was apparently a feature on the new SF opera, The Bonesetter's Daughter. But the program ended with an (unfortunately regular) feature of showing photos of US soldiers who have died in service. Alan Hovhaness' Prayer of St. Gregory, from the opera Etchmiadzin, played in the background.
Wikipedia on St. Gregory:
St. Gregory's pontificate saw the development of the notion of private penance as parallel to the institution of public penance. He explicitly taught a doctrine of Purgatory where a soul destined to undergo purification after death because of certain sins, could begin its purification in this earthly life, through good works, obedience and Christian conduct, making the travails to come lighter and shorter.