Can you analyze the metaphysical concepts of non-duality and 'shaktipat' as presented in Chapter 40?

Chapter 40 delves into deep metaphysical concepts, starting with the power of Shri Sai Samarth. It states that when His hand is placed on a devotee's head, He performs 'shaktipat,' which is described as the transmission of spiritual energy. This act is directly linked to the destruction of the sense of duality, dissolving the separate feelings of 'me' and 'you.' The chapter illustrates this principle of non-duality with the analogy of a river and ocean becoming one, where no difference remains. This union is mirrored in the Guru-devotee relationship; as Chapter 40 explains, when a devotee seeks exclusive refuge, the Sadguru grants them His own 'Guru-nature,' making the unattainable attainable through the collapse of separation.