According to Chapter 3, what is the recommended spiritual practice for the Kali Age, and how does it compare to practices of previous eras?

Chapter 3 of the Sai Satcharitra explains that different ages had different primary spiritual practices. In the Kruta Age, it was control of the mind and senses; in the Treta Age, it was sacrifice; and in the Dwapara Age, it was worship. For the current Kali Age, the text highlights that 'singing the stories of the Name' is the simple and accessible means for attaining the supreme goal. This chapter emphasizes that for everyone, regardless of their caste or background, listening to the stories of the Guru is the prescribed path to spiritual progress in these times.