According to Sai Baba's teachings in the provided text, what is the role and significance of patience on the spiritual path?

According to the teachings in Chapter 19, Sai Baba elevates patience to a position of paramount importance for any spiritual seeker. He describes patience, or 'Saburi', as the "manliness of men" and a "mine of virtues." He taught that this quality alone can carry a person across the sea of troubles when heavy burdens fall upon them. Baba stated that patience wards off sin, distress, poverty, and fear, and ultimately brings success by causing calamities to flee. He went so far as to say that a life without patience is a life in vain, regardless of a person's knowledge or other virtues. Along with its sister virtue, Faith, patience is presented as the essential offering that a disciple makes to a Guru.