I've been turning over in my mind the question of nostalgia, and whether I suffer from it. I certainly don't get soggy at the memory of some childhood knickknack; nor do I want to deceive myself sentimentally about something that wasn't even true at the time - love of the old school, and so on. But if nostalgia means the powerful recollection of strong emotions - and a regret that such feelings are no longer present in our lives - then I plead guilty.