What initial conditions and promises are set forth at the beginning of Chapter 15 for those who wish to receive Sai's darshan and hear his stories?

At the beginning of Chapter 15, the text establishes that attaining the vision (darshan) of Sai is a result of "immense merits" that have borne fruit, which leads to overcoming the "threefold afflictions." The author then makes a plea to the listeners, asking them to show grace, contemplate their own Guru, and respectfully prepare their minds for the story. As Chapter 15 continues, it promises that if listeners partake of the story with patience and faith, they will attain devotion, liberation, happiness, and peace. The chapter essentially sets a contract: the listener's respectful attention will be rewarded with profound spiritual fulfillment.