What does Dnyaneshwar Maharaj say is the key to gaining knowledge from saints?

The preface in Chapter 0 cites the commentary of Lord Samarth Sadguru Dnyaneshwar Maharaj to emphasize the importance of service. Maharaj advises that if you wish to attain beautiful knowledge, you must "serve the saints with your entire being." This involves surrendering at their feet with your body, mind, and soul, and performing all service without ego. This selfless service is presented as the very doorway to the treasure of knowledge that saints possess, which they will then share to enlighten the heart and dispel all doubts.