
Egalitarianism as a revolt against nature, and other essays, Mises Institute, Zweite Auflage, Auburn 2000, ISBN 0-945466-23-4, S. 202, books.google.de http://books.google.de/books?id=WhGCDVK_Kq0C&lpg=PA202&dq=crime
Original engl.: "It is no crime to be ignorant of economics, which is, after all, a specialized discipline and one that most people consider to be a ‘dismal science.’ But it is totally irresponsible to have a loud and vociferous opinion on economic subjects while remaining in this state of ignorance."