Based on Chapter 19, how are the virtues of Faith (Nishtha) and Patience (Saburi) related, and why are they both essential for a disciple?

Chapter 19 portrays Faith (Nishtha) and Patience (Saburi) as intrinsically linked and mutually reinforcing virtues. The text beautifully describes them as 'two sisters, dear as life to each other.' This metaphor suggests they are inseparable; one cannot be truly cultivated without the other. The chapter emphasizes that a Guru, even a powerful one, expects a disciple to possess both 'strong faith at the Guru’s feet and the strength of courage which is patience.' Faith provides the foundation of trust in the Guru's guidance, while patience provides the endurance to persist through challenges and await the results of one's spiritual efforts. Together, they form the complete offering—the 'two paise'—that a disciple must give to progress on the spiritual path.