Based on the provided passages, what is the connection between receiving Darshan, getting permission to leave, and obtaining Udi?

The source material from Chapter 35 establishes a clear and profound connection between Darshan, departure, and Udi, framing them as events governed solely by Sai Baba's grace. Firstly, arrival for Darshan is not a matter of one's own will. Baba's saying is cited: 'No one comes unless I bring them.' Only when mercy arises in his heart do people come. Similarly, departure is not to be decided by the individual. To leave without consent is to invite 'dreadful interruptions.' A devotee must formally request permission to leave. The culmination of this process is the bestowal of Udi. The text explicitly states that unless Sai's heart is pleased, 'No one gets the permission, along with the gift of Udi.' Thus, the Udi serves as the physical confirmation of both the blessing of Darshan and the sanctioned permission for departure, linking the entire spiritual journey in Shirdi to Sai's divine will.