What does Chapter 10 present as the simplest and most effective form of spiritual practice (Sadhana) for achieving liberation?

Chapter 10 presents a very simple yet profound form of spiritual practice, or Sadhana. It advises 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 act of mere remembrance, the chapter explains, is powerful enough to untie the knot of birth and death. This particular Sadhana is highlighted as being the most effective because it costs nothing, not even a single penny, yet with little effort, "great fruit is obtained, and everything comes easily into one's hands."