呼吸歌，呼吸歌，呼吸原来是橐龠。呼吸上下闲来往。呼吸升降有着落。呼吸
采药知老嫩，呼吸法度不要错。呼吸中间有一窍，呼吸惟恐无声乐。呼吸以喉风顺去，
呼吸以踵圣逆夺。人人尽把呼吸过，不认呼吸空打坐。呼字坐在北斗下，吸字住在
南宫角。呼字搬上昆仑顶。吸字运入三清阁。呼字洪 开至窍，吸字未生弄橐龠。不是
口鼻呼吸处，实笑愚人大弄错。人死若得真呼吸，复旧如初又在世。有人识破呼吸处
，拜访明师说仔细。
桑榆漫志（陶辅）
鼻阳也，饮天之六气；口阴也，食地之五谷。气以滋元，谷以养血。气附血而固，
如天之附地，血根据气而荣，如地之根据天。血气和而精生，精神坚而神爽。一不能招存，
两不能禁止。能禁者久视，能存者神乎。
推蓬寤语（云间李豫亨）
丹书曰∶五行顺行，法界火坑；五行颠倒，大地成宝。夫地至广大，何以能成宝也？
盖五行相生，俱自土中，而形见于外，故生金生水生木生火，而坤土之气遂泄。如水不外
流而藏体于金，火不外扬而藏体于木，金木交并复归真土，则气不散逸，为人物、为草木
禽鱼，而坚固不散，尽成黄金。气不败朽矣。故曰∶遍地俱黄金也。知此，人能内固精
神，不外施用，身中三宝亦如金之不败朽矣，其长生久视奚疑？
Song of Breathing, Song of Breathing, the function of breathing is originally like a bellows (Tuoyue). Breathing comes and goes leisurely between the upper and lower parts. The rising and falling of breathing has a definite landing point. When harvesting medicine within breathing, one must know its maturity or immaturity; the method of breathing must not be mistaken. There is an aperture in the middle of breathing, and one fears there will be no sound and joy in breathing. Exhalation goes with the wind through the throat, while inhalation is seized inversely from the heels. Everyone merely treats breathing as a passing phase, failing to recognize true breathing and sitting in meditation in vain. The character "Hu" (exhale) resides below the Big Dipper, and the character "Xi" (inhale) dwells in the Nangong Jiao constellation. The character "Hu" moves the energy up to the peak of Kunlun. The character "Xi" transports it into the Sanqing Pavilion. "Hu" loudly opens to the aperture, and "Xi" stirs the bellows before birth. This is not the place of mouth and nose breathing; it is truly laughable that fools make such great mistakes. If one could obtain true breathing after death, one would return to the original state and live again in the world. If someone could penetrate the key of breathing, they should visit a enlightened master to explain it in detail.
*Summary of Mulberry and Elm* (Tao Fu)
The nose is Yang, absorbing the six Qi of Heaven; the mouth is Yin, consuming the five grains of Earth. Qi nourishes Yuan Qi, and grains nourish Blood. Qi attaches to Blood to become solid, just as Heaven attaches to Earth; Blood relies on Qi to flourish, just as Earth relies on Heaven. When Blood and Qi are harmonious, Essence is generated; when Spirit and solidity are firm, Shen is clear. If "Cun" (preservation) cannot attract retention, and "Shi" (vision) cannot prohibit movement, those who can "prohibit" can see for a long time, and those who can "preserve" have transcendent spirit.
*Words Heard While Pushing Open the Window* (Li Yuheng of Yunjian)
Alchemical texts say: When the Five Elements proceed in their natural order, the Dharma realm becomes a pit of fire; when the Five Elements are reversed, the earth becomes treasure. Why can the vast earth become treasure? It is because the generation of the Five Elements all originates from Earth, with forms manifesting externally; thus generating Metal, Water, Wood, and Fire, causing the Qi of Kun Earth to leak. If Water does not flow outward but hides its substance in Metal, and Fire does not rise outward but hides its substance in Wood, and Metal and Wood merge and return to True Earth, then Qi will not dissipate. It becomes humans, animals, plants, birds, and fish, remaining firm and undissipated, turning entirely into gold. Qi will not decay. Thus it is said: The whole ground is gold. Knowing this, humans can internally consolidate Spirit and Essence, not expending them outwardly. The Three Treasures within the body will also remain undecayed like gold. What doubt remains regarding longevity and enduring vision?