Describe the spiritual significance of the Godavari river and its connection to Shirdi, as explained in the text.

Chapter 4 portrays the Godavari river as a place of immense spiritual power and significance. It is described as a holy river whose water and cool breeze destroy the "darkness of worldly existence." The text notes that many great saints flourished on its banks and its holy sites are famous. The water of the Godavari, also called "Gomati," is said to destroy sins and cure the disease of worldly life. This sacred river is located in the Kopergaon Taluka, and crossing it leads towards Shirdi. Chapter 4 emphasizes that just as many saints have graced its banks, Sai, the "Lord of Yoga," also appeared on the Godavari for the world's upliftment.