John Maynard Keynes says that his ideas will no doubt be rejected because they are so novel and revolutionary. Toward the end of the same book, he seems to have forgotten this because now he says he is reviving the same centuries-old ideas that he had once dismissed as the most absurd fallacies. At least he acknowledges that he is changing his position, although he does not explain how his ideas can be new, revolutionary, and also centuries old. This is of a piece with his describing himself as a member of the brave army of rebels and heretics down...
http://mises.org/daily/6420/Two-Sides-of-the-Same-Debased-Coin