Describe the emotional transformation of Sapatnekar from his initial despair to his final state of joy as depicted in the text.

Sapatnekar's journey, described in Chapter 48, is one of profound emotional transformation. He began in a state of despair, feeling rejected by Baba's repeated "Chal Hat" rebukes and questioning his own past deeds. This distress led him to a firm resolution to stay until he received grace. The turning point came when he held Baba's feet and heard his life story from Baba's lips. Finally, hearing Baba's promise to bring a son to his lap and feeling Baba's hand of encouragement on his head, his despair vanished. He was overwhelmed as the eight-fold emotions welled up, and his eyes filled with tears of joy, with which he lovingly washed Baba's feet, his faith and heart completely restored.