When one compares his utterances of a year or so ago with those made fifteen years earlier, a thing that strikes one is the rigidity of his mind, the way in which his world-view doesn’t develop. It is the fixed vision of a monomaniac and not likely to be much affected by the temporary manoeuvres of power politics
Source: ‹ George Orwell’s 1940 Review of Mein Kampf Book Marks