I was going to make this thread myself, actually...
Just last night I was reading my old diary from September-December 2008. That was just before the problems started, and nearer the end includes my discovering AS. It's amazing how much I have changed and grown in several months. Back then I was so naive, childish, yet happy. Not a depressed bone in my body. I would write about silly funny things that happened during the day.
But my current diary is full of dark depressing things. The first page is about the time I tried to exact revenge upon my mother and brother for mistreating me, and it went wrong and got me in trouble; I ended up drinking heavily that night and got a hangover in the morning (to this day, nobody knows where that bottle of wine went). I only wrote a few pages after that, about the transfer to my new school, and then I felt so bad emotionally I didn't bother writing for a long time. I only just started writing again. I guess I'd forgotten how much writing could help.
I destroy all my old diaries every now and again, because I'm seriously paranoid about them. But I think I'll be keeping the ones I have at the moment, because I have stopped writing the stuff that could be embarrassing.
Even after the diaries are gone, the main points of them are still imprinted in my brain - that's how I can often remember things like how long my obsessions have lasted. The time before I started writing diaries is a blank space in my mind, save for a few memories (but I don't remember the time they occurred unless they were once written down).
_________________
'El reloj, no avanza
y yo quiero ir a verte,
La clase, no acaba
y es como un semestre"