Marxism, Freudianism, global warming. These are proof - of which history offers so many examples - that people can be suckers on a grand scale. To their fanatical followers they are a substitute for religion. Global warming, in particular, is a creed, a faith, a dogma that has little to do with science.

For me this is the vital litmus test: no intellectual society can flourish where a Jew feels even slightly uneasy.

If anti-Semitism is a variety of racism, it is a most peculiar variety, with many unique characteristics. In my view as a historian, it is so peculiar that it deserves to be placed in a quite different category. I would call it an intellectual disease, a disease of the mind, extremely infectious and massively destructive.

Conservation of energy. Never stand up when you can sit down, and never sit down when you can lie down.

Hell is being trapped in a night-club with the'beautiful people'and forced to live in a'luxury penthouse flat'.

If I see a door ajar, I push on it to see how far it will open, and if it opens wide I go through it.

In 1924 Mao took a Chinese friend, newly arrived from Europe, to see the notorious sign in the Shanghai park, 'Chinese and Dogs Not Allowed'.