What does Dnyaneshwar Maharaj teach about how to acquire true knowledge from saints?

Chapter 0 cites the teachings of Lord Samarth Sadguru Dnyaneshwar Maharaj, who explains the path to obtaining knowledge. He teaches that "service is the doorway" to the treasure of knowledge. To receive this profound insight, which enlightens the heart and ensures that "doubts will not arise," one must serve the saints with their entire being. This involves a complete surrender—with body, mind, and soul—at their feet. Furthermore, this service must be performed without any ego to be truly effective in bringing that beautiful knowledge into one's mind.