The thought isn't you. It comes and goes like the wind. Can you grasp the wind? Talking with yourself about it is trying to grasp it instead of just letting it come and go. It's not really altering anything, just giving you a little more of a chance to keep it around a while longer. Writing it down makes it easier to keep it around awhile longer, but even that won't keep it around forever, especially if you write it badly (a Seinfeld episode comes to mind), not in enough detail, or if you lose the note you write.