"I'm sorry that there are so many things that I've not told you. I don't keep these things secret to be deceptive, but some things are easier for you not to know. Like with Ennie and Neville. They are happier in their ignorance, and if Neville is fixed now then the reasons for his issue in the first place aren't important ... and they'll just lead to unnecessary heartache if the memories are re-awoken.