This Chapter from Lü Dongbin's The Secret of the Golden Flower details the validation stages of the "returning the light" practice. The text describes initial experiences of calmness and pleasantness, progressing to visions of illumination and a strengthened, revitalized body. Further validation stages involve visualizations based on Buddhist and Taoist imagery, ultimately leading to the discovery of primordial energy and the refinement of the elixir. Three readily verifiable signs—echo-like hearing, a white room vision, and a floating sensation—are also highlighted, emphasizing the importance of trusting one's own experiences. The ultimate goal is the cultivation of vast compassion and unwavering determination.