The problem is, I don't think I'd know how to study any more. And I certainly wouldn't know how to begin writing about my "current research interests" as I'd have to do if I wanted to apply to do postgrad study -- basically, looking at the application forms and requirements, I need to be doing research in order to start doing research. Which means I should be doing it in my spare time while I'm working ... and I simply don't have the energy. Which, of course, means I'm not capable of doing postgrad study anyway: if I can't make the time/energy to study now, there's no way I could do a postgraduate degree.
I have so many ideas for things I want to write about, but I no longer seem to be able to put them into words. And if I do try to put them into words, the ideas seem to shrink and shrink until they're the kind of ideas that 14-year-olds would scorn to bother with for GCSE coursework.
I wish I could just make myself accept the fact that I'm not an intellectual, and never will be. Yes, I was passable at my schoolwork; that doesn't mean I can compete with adults. ... I wish I could stop thinking altogether.