Acharya Prashant discusses the four categories of people in relation to a guru: disciples, devotees, the indifferent, and the hostile. He explains that according to Shri Ramana Maharshi, all four categories benefit from the presence of a gyani, though in varying degrees and ways. The guru represents the embodied truth, and even those who are indifferent are eventually impacted because the guru's influence spreads through the entire ecosystem. An indifferent person may be occupied by the world, but they are connected to others who may not be indifferent, eventually forcing them to take note of the truth through their environment.