How does Chapter 19 describe the relationship between Faith (Nishtha) and Patience (Saburi)? Are they independent virtues?

Chapter 19 presents Faith (Nishtha) and Patience (Saburi) as deeply interconnected virtues, not as independent qualities. Sai Baba describes them as the 'two paise' he offered his Guru, indicating they are a required pair for spiritual discipleship. The text uses a beautiful metaphor to illustrate their connection, stating, 'Faith and Patience are like two sisters, dear as life to each other.' This suggests that one cannot exist meaningfully without the other on the spiritual path, and both are essential for a disciple to offer their Guru, as life is considered in vain without patience.