Can you explain the concept of 'undifferentiated worship' and how one can achieve it?

Chapter 45 describes "undifferentiated worship" (Abheda-bhajan) as a state of seeing divinity in all beings. This is not an initial practice but the result of a profound spiritual journey. The process begins by recognizing that Brahman is eternal while the world is transient, and that the Guru is the true embodiment of Brahman. By renouncing the transient world, a state of dispassion, or Vairagya, is cultivated. The seeker then meditates on the Sadguru, who is described as a solid mass of Brahman-consciousness. This meditation ultimately leads to the realization of divinity in all beings, which is the essence of undifferentiated worship.