You come to this place, midlife. You don't know how you got here, but suddenly you're staring fifty in the face. When you turn and look back down the years, you glimpse the ghosts of other lives you might have led. All your houses are haunted by the person you might have been. The wraiths and phantoms creep under your carpets and between the warp and weft of your curtains, they lurk in wardrobes and lie flat under drawer liners. You think of the children you might have had but didn't. When the midwife says, "It's a boy," where does the girl go? When you think you're pregnant, and you're not, what happens to that child that has already formed in your mind? You keep it filed in a drawer of your consciousness, like a short story that wouldn't work after the opening lines.
--Hilary Mantel. Giving Up the Ghost