What does Chapter 10 describe as the most effective and accessible spiritual practice (Sadhana)?

As detailed in Chapter 10, the best of all means (Sadhana) is to simply remember the Guru with a heart full of love. This practice is highlighted for its accessibility, costing "not even a single penny." The text emphasizes that with little effort, great fruit is obtained, and by His mere remembrance, the knot of birth and death is untied. This simple act of devotion is presented as a powerful path to liberation, superior to the struggles of logic or other intellectual acrobatics, making spiritual attainment accessible to all who strive for it.