Describe the Patil's reaction after his miraculous healing in Chapter 13 and how he chose to express his gratitude.

After his miraculous healing, the Patil was overwhelmed with joy and gratitude. Chapter 13 describes how he went for Baba's darshan, and upon seeing Sai's face, his 'ocean of joy... became filled with the tide of bliss.' He shed tears of love and placed his forehead on Baba's feet, acknowledging the 'inconceivable and unfathomable' nature of Sai's grace. Recognizing he could never truly repay this favor, he determined that total surrender was his only recourse. To express his ongoing gratitude, the Patil initiated the 'Satya-Sai vow,' a regular practice of devotion performed every Thursday, which involved reading sacred texts about Sai and brought him immense peace.