According to Chapter 49, how does meditation on the Guru compare to other spiritual practices like pilgrimages or charity?

Chapter 49 presents a distinct hierarchy of spiritual practices. The author states that penance is considered greater than pilgrimages, vows, sacrifices, or charity. Following that, the singing of Hari's name is considered greater still than penance. However, the chapter unequivocally declares that the 'meditation on one's own Guru is the greatest of all.' For Sai's followers, this means that meditating on Sai is their ultimate object of meditation, their form of worship, and their most valuable secret treasure, surpassing all other spiritual disciplines.