Hi Jon,
I don’t claim to have a complete understanding of the history of Lutheranism, or even how such things as purgatory are understood in certain branches of Lutheranism today. However: I did take the time to look up the Luther quotes cited in the link you provided, “The Hope of Eternal Life.” According to the authors of the link, Luther believed:
-Purgatory isn’t taught in Scripture, but yet may exist.
-Purgatory is only to be avoided because of its associations with “unacceptable practices.”
-If these practices were removed, a proper discussion on purgatory could occur.
According to this article here is Luther’s view of purgatory: “A belief that could be discussed in principle is concretely objectionable because of its associations.” In other words, purgatory, for Luther, was an open question. Get rid of what Luther considered to be the abuses attached to it, and then it could be discussed. Certainly such an interpretation could be within the realm of possibility, because, In regard to the Smalcald Articles, LW states, “Under these circumstances the elector of Saxony instructed Luther in a letter of Dec. 11, 1536, to prepare a statement indicating the articles of faith in which concessions might be made for the sake of peace and the articles in which no concessions could be made.”
I would direct people to actually read the statements in context of the Smalcald Articles. Luther states most emphatically:
“Consequently purgatory and all the pomp, services, and business transactions associated with it are to be regarded as nothing else than illusions of the devil, for purgatory, too, is contrary to the fundamental article that Christ alone, and not the work of man, can help souls.”
The reading given to this statement and then the second one about Augustine’s view by “The Hope of Eternal Life” downplays the first explicit rejection of purgatory, and sees the real Luther in his willingness to discuss what Augustine meant (after “purgatorial masses” were abolished). The problem as I see it, is this reading of the Smalcald Articles isolates these statements from Luther’s total written corpus, particularly any writings after the Smalcald Articles. In his later commentary of Genesis, Luther makes very similar points to those in the Smalcald Articles about purgatory. He calls purgatory “a lie of the Devil” and that Augustine’s comment is so obscure, that it doesn’t prove anything. This isn’t an isolated statement either. If you search through Luther’s writings, you’ll find explicit statements from his later writings that he did not embrace purgatory, even a version of it with what Luther considered attached abuses.
JS