Han Kang said this quote

Even as a child, In-hye had possessed the innate strength of a character necessary to make one's own way in life. As a daughter, as an older sister, as a wife and as a mother, as the owner of a shop, even as an underground passenger on the briefest of journeys, she had always done her best. Through the sheer inertia pf a life lived in this way, she would have been able to conquer everything, even time. If only Yeong-hye hadn't suddenly disappeared last March. If only she hadn't been discovered in the forest that rainy night. If only all of her symptoms hadn't suddenly got worse.