What reason does Chapter 23 give for why saints incarnate on earth, and what is needed to benefit from their stories?

Chapter 23 of the Shri Sai Satcharitra explains that the incarnations of saints happen on earth out of benevolence, specifically for the salvation of "dull-witted souls." This is presented as an act of grace from the Almighty. The chapter further states that for a person to even develop a desire to hear the stories of these saints, they must have merit (Punya) in store from their past. It is through this desire and the subsequent hearing of saints' stories that one can attain happiness and contentment, suggesting that prior merit is a key to unlocking this spiritual path.