" It seems to Marithe that her life has undergone two changes: one, when her father left. And two, about a year ago, when she turned thirteen, when her life and the way she felt about it and the way she viewed it suddenly tilted; like the deck of a ship in a storm.
At first it seemed to her that her house, her family, her dogs, her accordion, her books, her room with its geology samples, its display of feathers, its pictures of foxes and wolves, all took on an unreal aspect. Everything felt like a stage set: she kept viewing herself as if from the outside. Instead of just acting, just doing, just running or speaking or playing or collecting, she would feel this sense of externalisation: and so, a voice inside her head would comment, you are running. Do you need to run? Where are you going? You're picking up that rock but do you want it, do you really need it, are you going to carry it home?
[...]
And her body! Some mornings she woke and it was as if lead weights had been attached to her limbs by some ill-meaning fairy. Even if she had the urge to walk across the paddock to feed the neighbours' horses -- which she hardly ever did any more, she didn't know why -- she wouldn't have the energy, the sap in her to do it.
She wanted it returned to her, Marithe did, that sense of security in her life, of certainty, of knowing who she was and what she was about. Would it ever come back? "
― Maggie O'Farrell , This Must Be the Place