Can you explain the concept of complete surrender as prayed for by the devotee in Chapter 26?

Chapter 26 details a profound prayer for complete surrender to the Sadguru, Sai Baba. The devotee asks Baba to take away their body-consciousness, expressing a desire to be free from the duality of pleasure and pain. The prayer continues with the plea to be moved like a puppet according to the Guru's will and for the mind to be restrained. This act of surrender is so total that the devotee lays their ego at Baba's feet, stating, 'from now on, You look after Your own—there is no "me-ness" left in me.' This supplication, as found in Chapter 26, is a request for the Guru to become the devotee's very sense of self, thereby achieving a state of union and finding ultimate peace.