Based on the provided text, what are the qualities of a devotee that attract Sai Baba's grace, and who is presented as an example?

Chapter 29 presents several qualities of devotees who attract Sai Baba's grace. The pilgrims from Madras are described as "righteous and pure." Following their story, the text introduces another "foremost devotee," Raghunathrao Tendulkar from Bandra, as an example of an ideal follower. He is characterized as "wise, patient, and learned." Furthermore, he is described as being "Always joyful, with great love, devoted to Sai's lotus feet," and he continuously engaged in humming the divine name. His devotion was so deep that he composed a "Bhajan Mala" describing Sai's divine play.