According to Chapter 10, what is the simplest and most effective spiritual practice (Sadhana) available to a devotee?

Chapter 10 describes the most effective and accessible spiritual practice as simply remembering the Guru with a heart full of love. This act of remembrance is hailed as the best of all means, or Sadhana, because it costs nothing, requires little effort, and yields great fruit, making all things come easily into one's hands. The text emphasizes that by His mere remembrance, the complex knot of birth and death can be untied, showcasing the profound power accessible through this simple devotion. This method is presented as a path where great spiritual rewards are obtained with minimal struggle.