"You must also be aware, Hermione, that once we start the unraveling and dismantling of these memory spells, we cannot stop the process. As I weaken these spells, some will start to break on their own. This may become a very confusing time for you. A lot of what you thought you knew will change. While you're asleep you may dream about your blocked or altered memories as they should be. Even while you're awake you may begin to remember flashes of the past you've forgotten. I would recommend writing down any of these flashes or dreams."