How did the act of receiving Udi relate to a devotee's departure from Shirdi?

As detailed in Chapter 33 of the Shri Sai Satcharita, the giving of Udi was a significant and established practice for devotees leaving Shirdi. When devotees would ask for Sai Baba's permission to return to their villages, he would give them Udi. The text explicitly states that when Baba said, "Take the Udi," it was understood by everyone that true permission to leave had been granted. This act would fill the minds of those who wished to return with enthusiasm, making the Udi a clear and cherished signal of his blessing for their journey, a practice known to all devotees mentioned in Chapter 33.