Based on his experience with his own Guru, what did Sai Baba say is the most important requirement for a disciple?

Sai Baba emphasized that the most crucial requirement for a disciple is unwavering faith and focused attention on the Guru. Drawing from his own experience, he explained that complicated spiritual practices or deep knowledge of the six Shastras are not the primary need. As stated in Chapter 19, the essential thing is to "have complete faith that the Guru is the doer and the destroyer." He instructed a woman seeking guidance to "Look at me with undivided attention, and I will look at you the same way," revealing that this focused contemplation was the entirety of his own Guru's teaching to him. This singular focus and trust, he taught, is what allows spiritual wealth to come into one's hands.