What is the significance of Sai's Udi, and what can a devotee attain by using it?

The sacred ash, or Udi (Vibhuti), from Sai's dhuni fire holds immense power and significance for devotees. As explained in Chapter 35, those who apply this Vibhuti daily with love at Sai's feet can attain their heart's desires. The text further elaborates that contact with Udi can root out even powerful and minor sins, granting a state of purity both within and without. Chapter 35 states that through this practice, devotees can become fulfilled by attaining the four goals of life, including Dharma, and all secret meanings will be revealed to them.