This science fiction novel differs greatly from many others I've read before, focusing not on future technological advancements, but on the societal and psychological changes of humanity after such advancements.
The story can be interpreted on two levels.
One is the religious level, examining the influence and control methods of Hinduism, Buddhism, and Christianity over individuals, as well as the struggles between religions.
The second is the human nature level, where technological progress allows for consciousness transfer to different bodies, approaching a state of immortality or divinity. Some individuals who master the technology control others through religious models, living a paradise-like life. However, each person's pursuit of life is different; some value diverse life experiences, enjoying different lives through consciousness transfer to different bodies (or reincarnation); some prioritize emotional connections, wishing to be with their loved ones across lifetimes, regardless of the body; others focus on aesthetics, wanting to see more beautiful environments, lives, and social models, even risking their lives to fight against evil forces; and some place greater importance on competition, seeking to be superior to others in any aspect.