How are Faith (Nishtha) and Patience (Saburi) related, and why are they both considered essential for a disciple?

The connection between Faith (Nishtha) and Patience (Saburi) is depicted as deeply intimate and inseparable. Chapter 19 beautifully illustrates this by describing them as "two sisters, dear as life to each other." They are presented as the two primary qualities a Guru expects from a disciple. The text clarifies that even a very powerful Guru looks for "strong faith at the Guru’s feet and the strength of courage which is patience." A life is considered in vain without patience, highlighting its critical role. This suggests that faith provides the foundation of belief in the Guru and the path, while patience provides the endurance to walk that path through all its challenges.