According to the commentary by Dnyaneshwar Maharaj cited in the text, what is the prescribed method for a disciple to receive true knowledge from a Guru?

The preface references the teachings of Lord Samarth Sadguru Dnyaneshwar Maharaj to illustrate the path to enlightenment. According to the verses cited in Chapter 0, if you wish to attain knowledge, you must serve the saints with your entire being. This involves surrendering completely at their feet—with body, mind, and soul—and performing all service without ego. It is through this selfless and total service that the Guru, pleased with the disciple's devotion, imparts wisdom that enlightens the heart and ensures that no doubts will arise again.