How does Sai Baba characterize the relationship between Faith (Nishtha) and Patience (Saburi) in his teachings?

According to the account in Chapter 19, Sai Baba presents Faith (Nishtha) and Patience (Saburi) as being inextricably linked and fundamentally important for a disciple. He uses the beautiful and intimate metaphor of them being 'like two sisters, dear as life to each other.' This implies they are not just complementary but also interdependent. The text further elaborates on this by stating that even a powerful Guru expects 'strong faith at the Guru’s feet and the strength of courage which is patience.' This suggests that faith provides the foundation and direction, while patience provides the endurance and resilience needed to stay on the spiritual path, making them the two essential offerings for a disciple.