How did Sai Baba describe the importance of patience, or 'Saburi'?

In Chapter 19, Sai Baba extensively details the supreme importance of patience, which he calls 'Saburi'. He equates patience with courage, calling it "the manliness of men" that effectively wards off sin, distress, poverty, and fear. He describes it as a "mine of virtues" and the "queen of the King of Good Thoughts." Baba also presents Patience and Faith (Nishtha) as two inseparable sisters, both equally vital. He warns that a person without patience, regardless of their knowledge or virtue, lives a life that is in vain. This virtue is presented as the key to overcoming calamities and achieving success, a foundational element for any spiritual aspirant seeking the Guru's grace.