Can you explain the themes of non-duality and equality as presented in the twelfth chapter of the Sai Satcharitra?

Chapter 12 delves deeply into the concepts of non-duality and equality. It begins by praising the Guru, Sai, as the one who removes the 'obsession with duality even from the dull-witted' through the knowledge of non-duality. This theme of oneness is then extended to social and moral equality. The chapter explicitly states that for saints, the virtuous and the wicked are equal, and for Sai Baba specifically, there is no feeling of friend or foe, and 'the pauper and the king are the same.' This 'enmity-free equality,' as detailed in Chapter 12, is a central characteristic of Sai's nature.