“He did not see in the outcome of that war the least proof of the incorrectness of his theory. On the contrary, to his mind, the departures from his theory were the only cause of the whole failure…Pfuel was one of those theorists who so love their theory that they forget the purpose of the theory—its application in practice; in his love for theory, he hated everything practical and did not want to know about it. He was even glad of failure, because failure, proceeding from departures from theory in practice, only proved to him the correctness of his theory.”
- Leo Tolstoy [War and Peace, III.1.X]