The text calls Sai a "Lord of Yoga." Can you explain the philosophical state of being that he embodied?

Chapter 4 describes the profound philosophical state embodied by Sai, the "Lord of Yoga." This state is characterized by a complete sense of oneness, where the feeling of duality is discarded. In this state of non-duality, everything, both moving and unmoving, is realized as Brahman. The text in Chapter 4 explains this realization as "I am everything," which leads to supreme devotion and immense happiness. When this "I-ness" is attained, the concepts of enmity and fear dissolve because nothing is perceived as separate from the Self, showcasing a state of complete Self-realization.