What is described as the most effective spiritual practice, or Sadhana, in Chapter 10, and what are its benefits?

In Chapter 10, the simplest and most effective spiritual practice, or Sadhana, is identified as constantly remembering the Guru with a heart full of love. This method is praised as "the best of all means" because it costs nothing, not even a single penny, yet yields great fruit with little effort. The primary benefit mentioned is that by His mere remembrance, the difficult "knot of birth and death is untied." The text encourages one to strive in this practice every moment, asserting that it makes everything come easily into one's hands.