Can you give me a summary of the topics that are introduced at the beginning of Chapter 8?

Certainly. The introduction to Chapter 8 of the Shri Sai Satcharitra first offers salutations and briefly recaps the previous chapter, mentioning how Sai appeared, his yogic practices like Dhauti and Khanda-yoga, and how he turned a barren wasteland into a garden. It then outlines the specific stories and teachings to be covered in the current chapter. These include an exploration of the greatness of human birth, a description of Sai Baba's habit of begging for alms (bhiksha), the dedicated service provided to him by Baijabai, the wonder of Baba's meals, and a narrative of how Tatya, Baba, and Mhalsapati would sleep together in the Masjid.