This is a preface and excerpts from the Lingbao Essential Teachings, a foundational text of the Zhong-Lü alchemical school within Daoism. Authored by Zhongli Quan and transmitted to Lü Dongbin, it details alchemical principles, cosmology, and self-cultivation practices aimed at achieving immortality. The text draws on a compilation of earlier works, emphasizing the interplay of Yin and Yang, the importance of timing, and the refinement of internal energies. Its influence extended to later Daoist schools, solidifying its importance in the history of internal alchemy (Neidan). The preface highlights the author's discovery of the source material and his decision to share this knowledge widely.

This Chapter details a Daoist method for spiritual transcendence, outlining a process of shedding the mortal form to become an immortal being. The text emphasizes internal observation and the cultivation of Qi to achieve this state, describing the stages of spiritual ascent and the visions experienced during this journey. It also provides cautionary advice, highlighting potential pitfalls and the importance of thorough preparation. The ultimate goal is achieving harmony with Heaven and Earth, potentially attaining sainthood and residing in divine realms. Several canonical Daoist texts are cited to support the described practices.

This Chapter from a Daoist text, "Chapter 9 Internal Observation and Exchange," detailing practices for spiritual cultivation. It describes achieving union of heart and Qi through internal observation, employing metaphors to illustrate the formless Dao. The text outlines a specific meditative practice involving visualization and techniques to overcome obstacles, emphasizing the importance of detachment from visions and the pursuit of transcendence beyond physical limitations to achieve true immortality. Ultimately, it stresses simplification and transcendence of methods as the path to ultimate truth.