snip
I've never been able to understand memory. There are, of course, certain things that happen to you that are always at the forefront of your mind, events you discuss or think about often, (although probably never in the same way twice). Then there are others, more secretive, that float in and out of your mind unbidden, tantalizing, but hazy and never fully visualized.
This is where most of my childhood memories lie, in that vague, unrealized category. Sometimes it will seem as if a file has suddenly slipped open in my mind, spilling its contents momentarily for me to glimpse. But I never get a clear look at what is inside. Other memories from those earlier times never seep out, but I feel certain that these memories never really disappear; they just get misfiled somewhere. Sometimes, searching through the vast catalogue of unmarked files that make up memory, you come across one that seems strange, almost dreamlike--childhood dreams and nightmares that have somehow, over the passage of time, been placed in the wrong folder.
snip
http://www.dailykos.com/story/2009/11/22/222825/62