I write a diary every day and have done for many, many years. It’s a kind of idiotic schoolboy diary, “Got up, sun shining, had eggs for breakfast, very tasty” – that kind of diary. I ask myself why I’m writing it. And I think it’s an act of kind of mental hygiene, a sort of throat-clearing every day, a tic, a habit, and also, of course, outrageous vanity.
(From the first programme, “James Boswell”, of a BBC Two series “Great Scots: The Writers Who Shaped a Nation”)