However, the refinement of the physical form is still stressed to slow aging, not out of fear of death, but because Taoists view Xìng (Mind/Spirit) and Mìng (Body/Vitality) as the flame and the oil of a lamp, inseparable and complementary. As the Essential Maxims of Xìng and Mìng states: "To cultivate the Mind without cultivating Life is like a lamp without oil; to cultivate Life without cultivating Mind is like oil without a flame." If the form decays, the spirit cannot easily be preserved; hence the saying, "When the body is at peace, the Tao flourishes."

The practice of Dual Cultivation is not a mechanical separation of Mind and Body; rather, they interpenetrate and promote one another throughout the process. When the practitioner exercises the body through dynamic movement (動功), they maintain concentration and mental stillness, which is the Mind leading Life. When cultivating the spirit through quiet sitting and mental fasting (心齋), the peaceful state of mind promotes harmony in the body's vital energy and ensures the stability of the organs—the Life promoting Mind.

Ultimately, the practitioner achieves the state of "Form and Spirit Both Sublime" (形神俱妙). In this ultimate state, the body is light and healthy, immune to illness and temperature extremes; the spirit is lucid, clear, and without attachment. One is no longer constrained by the apparent fear of death but realizes the essential connection between the self and the Eternal Great Dao.

The secrets of "Long Life and Lasting Vision," with its comprehensive system of Dual Cultivation, provide us with a broad path that transcends the limitations of existence. In our modern society, plagued by materialism and physical exhaustion, revisiting this ancient Taoist wisdom is not only a key to health and longevity, but also a way to find a sanctuary for our wandering spirit, guiding us toward a more harmonious, tranquil, and vital state of being.