Spiritual qi refers to essence, qi and spirit, which is the academic language of Taoism.
Philosophical premise: everything in the world, from a microscopic point of view, is composed of subtle substances, such as elementary particles.
About tangible and intangible, it is related to subjective concern: when people pay attention to the morphological structure, they observe the tangible state of matter; When people pay attention to functional changes, they observe the intangible state of matter.
Essence refers to fine substances in a tangible state, such as basic particles in a particle state. In the human body, it refers to the tangible elements that constitute all levels of human life activities, often in solid or liquid state.
Qi refers to fine substances that are invisible, such as basic particles that are fluctuating. In the human body, it refers to the basic intangible elements that constitute human life activities, often in the gaseous state.
God generally refers to the essential vitality, such as the morphological and functional changes of elementary particles. In human beings, it refers to the vitality of morphological and functional changes at all levels of human life activities. For example, the process of metabolism and getting rid of the old and absorbing the new is obviously operated by a self-organized and self-stable automatic control system.
Extension:
Essence, qi and spirit complement each other and are closely related. From the perspective of traditional Chinese medicine, the source of human life is essence, the motive force to maintain life is qi, and the embodiment of life is the activity of God. Therefore, the fine rise is enough and the spirit is prosperous; Deficiency of essence leads to deficiency, while deficiency of qi leads to deficiency of qi. On the other hand, Wang Shen means full of gas, and full of gas means full of essence. Traditional Chinese medicine evaluates a person's health, or the pros and cons of diseases, from these three aspects. Therefore, it is reasonable for the ancients to call essence, qi and spirit the "three treasures" of the human body. The ancients said that "essence, qi and spirit die, and qi and spirit die", so it is not difficult to see that "essence, qi and spirit" are the foundation of human life.