How does Chapter 4 explain the way saints like Sai help people who are engrossed in worldly life and have turned away from spirituality?

Chapter 4 clarifies that saints incarnate precisely when people become overly focused on worldly sources of happiness—such as wealth, status, and family—and turn away from the ultimate spiritual goal, or Paramartha. The chapter states that saints work to uplift devotees by building a 'temple of Ultimate Truth' upon a 'foundation of Renunciation' while working 'around the frame of Worldly Activity (Pravritti).' This indicates that they guide devotees to find a spiritual path even while engaged in their daily lives, thus easily uplifting them and helping them achieve ultimate well-being without demanding a complete renunciation of their worldly responsibilities.