What wisdom does Dnyaneshwar Maharaj offer regarding the connection between serving saints and acquiring knowledge?

In the preface presented in Chapter 0, the teachings of Lord Samarth Sadguru Dnyaneshwar Maharaj are quoted to highlight the intrinsic link between service and knowledge. Maharaj states that if you desire to bring beautiful knowledge into your mind, you must serve the saints with your entire being. He poetically describes service as the "doorway" to the "treasure of knowledge." This service must be egoless, involving a complete surrender at their feet. It is through this dedicated and selfless action that the saints will reveal the wisdom that enlightens the heart and dispels all doubts.