"Gu Yunshen, your medical record diagnosis is as follows -"
"Patient name: Gu Yunshen. Symptoms: existential crisis. Pathogen: another 'I'."
"Suggested treatment: team up with your con man and perform the most radical surgery on 'yourself'..."
Purpose: About how saviors can avoid becoming tyrants, about how reason is not the enemy of human nature, and about what is "good enough" salvation in a world destined to be imperfect.