 While in these examples “guarding Unity” refers to the constant awareness of the One as the principle of the many, in later times the same expression designates meditation practices based on the visualization of the One as an anthropomorphic inner deity. A classical description is found in the Baopu zi, where Ge Hong reckons “guarding the One” as the superior way of transcendence together with the ingestion of elixirs. The main practice consists in visualizing the features that the One as a god takes within the human being as it moves among the three Cinnabar Fields. Meditation on the One as an inner god is also described in the Laozi zhongjing and in the Dadong zhenjing.