Han Kang said this quote

Only Yeong-hye, docile and naive, had been unable to deflect their father's temper or put up any form of resistance. Instead, she had merely absorbed all her suffering inside her, deep into the marrow of her bones. Now, with the benefit of hindsight, In-hye could see that the role that she had adopted back then of the hard-working, self-sacrificing eldest daughter had been a sign not of maturity but of cowardice. It had been a survival tactic.