What reason does Chapter 23 give for the incarnation of saints on earth, and who is able to benefit from them?

Chapter 23 explains that the incarnations of saints occur on earth out of benevolence, specifically for the salvation of dull-witted souls. This is described as a manifestation of the grace of the Almighty. The chapter further clarifies that not everyone is immediately drawn to their teachings. It posits that only if a person has accumulated merit (Punya) in their store will a desire arise in their heart to hear the stories of these saints. This desire, born from past merit, is what allows an individual to attain the happiness and contentment offered by the saints' lives and lessons.