Based on the events in Shirdi, how important was a devotee's faith in experiencing divine miracles?

The accounts in Chapter 4 strongly suggest that a devotee's faith was the most crucial element for experiencing divine miracles. When Das Ganu was organizing a Saptah and wanted Vitthal to appear, Baba's response was, "Yes, yes, the form of Vitthal will appear! But the devotee must be full of faith." This directly links the manifestation of the divine to the believer's conviction. Similarly, before the miracle of producing sacred river water from his toes, Baba instructed Das Ganu, "This itself is our Prayag; keep firm faith in your mind." In both instances, faith was presented as the prerequisite for the spiritual experience. These events underscore the teaching that unwavering belief in the Guru's words and power was the key to unlocking divine visions and blessings.