What does Chapter 10 describe as the best and easiest spiritual practice for attaining liberation?

In Chapter 10, the text identifies the simplest and most effective spiritual path, or Sadhana. It states that the "best of all means" is to "always remember with a heart full of love Him who is devoted to the welfare of all people." This refers to remembering the Guru, Sai Baba. This practice is lauded because it costs nothing, requires very little effort to achieve great results, and leads to everything coming easily into one's hands. The ultimate fruit of this simple remembrance, as mentioned in the chapter, is that the very "knot of birth and death is untied."