How did Ratanji's great wealth fail to bring him true happiness?

Despite being a famous and wealthy Parsi merchant with vast properties and a generous nature, Ratanji was deeply unhappy. Chapter 14 explains that while he was "outwardly swimming in an ocean of joy," he was plagued by the "crocodile of a difficult inner worry." This profound sorrow stemmed from the fact that he had no son, only a large family of twelve daughters. The narrative states that for someone without a son, the happiness derived from wealth is considered "entirely fruitless." His constant contemplation on whether he would ever be blessed with a virtuous son left his mind without peace, making even food and drink seem tasteless and immersing him in perpetual unease.