The source mentions that "no one has unmixed happiness." How is this philosophical concept demonstrated through the character of Ratanji?

The philosophical concept that "no one has unmixed happiness" is vividly demonstrated through the story of the Parsi merchant, Ratanji, in Chapter 14. Outwardly, Ratanji was "swimming in an ocean of joy," possessing vast wealth and a generous spirit. Yet internally, he was tormented. The text reveals that "the crocodile of a difficult inner worry always surrounded the merchant." This worry was his lack of a son, which made his worldly success feel hollow. Chapter 14 uses his example to show that this is the "divine plan," preventing anyone from becoming too arrogant in their prosperity, as everyone has "some nagging worry or the other behind them." Ratanji's life perfectly embodies this principle.