According to Chapter 45, what is 'undifferentiated worship,' and how is it achieved through devotion to the Sadguru?

According to the teachings in Chapter 45, 'undifferentiated worship' or Abheda-bhajan is the state where divinity arises in all beings. This advanced state is achieved by recognizing the Guru as the true Brahman and the world as transient. The path involves renouncing the transient, which gives rise to dispassion (Vairagya). By meditating only on the Guru, who is described as a solid mass of Brahman-consciousness, and maintaining this constancy of feeling, the seeker achieves this profound level of worship. This process requires practicing discrimination between the eternal and the transient and renouncing the fruits of enjoyment.