The Taixi Jing 胎息经 Scripture of Embryonic Breathing

Taixi Jing (Scripture of Embryonic Breathing) is a masterpiece among ancient Chinese qigong texts. The term "taixi" (embryonic breathing) consists of two characters: "tai" (embryo) refers to the "sacred embryo," formed by the true spirit; "xi" (breath) denotes the "true breath," achieved when both internal and external respiration cease (the true breath is without breath). These two characters alone clearly indicate that the spirit and qi exist in mutual relation and serve as each other’s root. The spirit, belonging to yin, is metaphorically called "mercury"; qi, belonging to yang, is likened to "lead"—these represent the yin and yang within oneself. The spirit is one’s nature (xing), and qi is one’s destiny (ming). Nature cannot be separated from destiny, nor destiny from nature; the two are two-in-one, embodying the cultivation of both nature and destiny (xingming shuangxiu).

Thus, True Lord Xu Jing stated, "The spirit is nature; qi is destiny." Immortal Cao Wenyi said, "Let me tell you plainly, all of you: the root of destiny has always been the true breath."

The "embryo" metaphorically describes the mind-spirit abiding in stillness, which is the birth of concentration. Taoists refer to this as the "inner elixir" or "yin elixir," which can only form when one has freed oneself from the interference of external respiration, internal visceral functions, and all qi transformed from qi movement. Reaching this state is called "subduing qi" (fuqi). It is a state where traces of internal and external breathing are naturally imperceptible, leaving only the spirit shining alone—hence the saying, "The embryo forms within subdued qi."

As this sacred embryo coalesces, internal and external breaths naturally return to stillness—thus, "qi ceases within the formed embryo." Ancient immortals said, "Only when the pulse stops and qi halts does the embryo begin to form." Patriarch Chen Niwan wrote, "After practicing for a year, my six pulses ceased, and qi returned to its root; there was an infant in the lower field, whose appearance was exactly like mine." All these serve as evidence.

What Taixi Jing teaches is to directly work with spirit and qi, rather than obsessing over the postnatal illusory body. This aligns with Laozi’s principle: "Put aside the body, and the body is cultivated; forget the form, and the form endures," as well as the Tanzi Huashu’s formula: "Forget the form to nurture qi." Thus, in ancient qigong, this represents a relatively advanced level. Except for the true human-origin elixir method, which cultivates through the yin-yang of like kind, this is the only reliable and unbiased great way that connects one’s own yin-yang with the yin-yang of the void—ultimately simple, ultimately easy, ultimately sacred, and ultimately divine.