According to Sai Baba, what is the most essential quality a disciple should cultivate in their relationship with their Guru?

Based on the teachings in Chapter 19, the most crucial quality for a disciple is undivided attention and complete faith in the Guru. Baba conveys this directly, saying, "Look at me with undivided attention, and I will look at you the same way; my Guru did not teach me anything else." He further emphasizes that one must have "complete faith that the Guru is the doer and the destroyer," placing trust above intellectual knowledge or the mastery of spiritual texts. This unwavering faith and loving contemplation are what the Guru desires above all, and they are the keys to receiving spiritual wealth.