What advice does Chapter 16 offer to a disciple on how to approach their Guru and achieve spiritual union?

Chapter 16 of the Sai Satcharitra provides clear guidance for a disciple seeking spiritual union. The primary instruction is to serve the Guru with unwavering faith, as this is the path to attaining union with Brahman (Sayujya). The text sternly warns against any neglect in service or the use of "cleverness" (Chaturai), stating that such actions will lead a seeker into trouble. Ultimately, the chapter emphasizes that a disciple should simply surrender themselves completely to the Sadguru, who knows the disciple's pitfalls and provides the necessary remedies, acting as the ultimate refuge.