According to Sai Baba, what is the role of patience in a person's life, and why is it so important?

In the teachings shared in Chapter 19, Sai Baba describes patience as a cornerstone of a virtuous life. He calls it the 'manliness of men' and a 'mine of virtues' that wards off sin, distress, poverty, and fear. Baba explains that patience brings success and averts calamities, putting them to flight. He even states that a life without patience is vain, regardless of one's scholarly knowledge or other virtues. He presents Faith and Patience as two inseparable sisters, emphasizing that a Guru primarily expects these qualities from a disciple for their spiritual growth.