宇宙有至理，难以耳目契。凡可参悟者，即属于元气。气无理不运，理无气莫着。交并为一致，分之莫
可离。流行无间滞，万物根据为命。穿金与造石，水火可以并。并行不相害，理与气即是。生处伏杀机，
杀中有生意。理以气为用，气以理为体。即体以显用，就用以求体。非体亦非用，体用两不立，非理亦非
气，一言透天机，百尺竿头步，原始更无始，悟得其中意，方可言洗髓。
元气久氤氲，化作水火土。水发昆仑巅，四达坑井注。静坐生暖气，水中有火具。湿热乃蒸腾，为雨
又为露。生人又生物，利益满人世。水久澄为土，火乃气之燠。人身小天地，万物莫能比。具此幻化质，
总是气之余。本来非我有，解散还太虚。生亦未曾生，死亦未曾死。形骸何时留，垂老后天地。假借以
合真，超脱离凡类。参透洗髓经，长生无尽期。无假不显真，真假浑无际。应作如是观，真与假不二，
四大假合形，谁能分别此。
凡夫假作真，美衣为体饰。徒务他人观，美食日复日。人人皆如此，碌碌一身世。不暇计生死，总
被名利牵。一朝神气散，油尽而灯灭。身尸埋圹野，惊魂一梦摄。万苦与千辛，幻境无休歇。圣人独认
真，布衣而蔬食。不贪以持己，
岂为身口累。参透天与地，与我本一体。体虽有巨细，灵活原无异。天地有日月，人身两目具。日
月有晦明，星与灯相继。纵或星灯灭，见性终不没。纵成瞽目人，伸手摸着鼻。通身俱是眼，触着知物
倚。此是心之灵，包罗天与地。能见不以目，能听不以耳。心若能清净，不为嗜欲逼。自知原来
处，归向原来去。凡夫与圣人，眼横鼻长直。同来不同归，因彼多外驰。若能收放心，提念生与死。
趁此健身躯，精进用心力。洗髓还本原，凡圣同归一。
There exists the supreme principle in the universe, which is difficult to grasp through eyes and ears. Whatever can be comprehended belongs to Yuanqi (Primordial Qi). Qi cannot move without Li (Principle), and Li cannot manifest without Qi. They merge into one unity; separated, they cannot exist independently. Flowing without obstruction, all things rely on it for life. Gold can be pierced and stones shaped; water and fire can coexist. Moving together without harming each other, this is the relationship between Li and Qi. Where life arises, the mechanism of death lies hidden; within death, the seed of life resides. Li functions through Qi, while Qi takes Li as its substance. From substance, function is revealed; from function, substance is sought. Neither substance nor function stands alone; if neither substance nor function is established, neither Li nor Qi is defined. One word reveals the secret of heaven. Taking a step forward at the top of a hundred-foot pole, there is no beginning before the origin. Only by understanding its meaning can one speak of Xi Sui (Marrow Washing).
Yuanqi has long been misty and dense, transforming into water, fire, and earth. Water originates from the peak of Kunlun, flowing forth and filling wells and pits. Sitting quietly generates warmth; within water, fire is contained. Dampness and heat then evaporate, becoming rain and dew. It generates humans and all living beings, benefiting the entire human world. Water, over time, clarifies into earth; fire is the warmth of Qi. The human body is a small universe, unmatched by any other thing. Possessing this illusory physical form, it is merely the remainder of Qi. Originally not belonging to me, upon dissolution, it returns to Taixu (Great Void). Birth was never truly born; death was never truly died. When will the physical frame remain? In old age, it returns to heaven and earth. Borrowing the false to reveal the true, transcending and leaving behind the mortal class. Comprehending the Xi Sui Jing (Marrow Washing Classic), longevity knows no end. Without the false, the true cannot be revealed; true and false are boundless and indistinguishable. One should view it thus: true and false are non-dual. The form composed of the Four Elements (Four Greats) is a temporary combination; who can distinguish this?
The ordinary person mistakes the false for true, adorning the body with fine clothes. Vainly pursuing the gaze of others, enjoying delicious food day after day. Everyone is like this, busy with a mundane life. Having no time to consider life and death, always led by fame and profit. Once Shenqi (Spirit and Qi) scatters, the oil runs out and the lamp extinguishes. The corpse is buried in the wilderness, the startled soul captured in a dream. Ten thousand sufferings and a thousand hardships, illusions ceaselessly rest. The sage alone recognizes the true, wearing coarse cloth and eating simple vegetables. Not greedy, maintaining oneself; how could one be burdened by body and mouth? Comprehending heaven and earth, realizing they are originally one with me. Though bodies vary in size, their agility is originally identical. Heaven and earth have the sun and moon; the human body possesses two eyes. Sun and moon have darkness and brightness; stars and lamps follow sequentially. Even if stars and lamps extinguish, the Nature of Seeing ultimately does not perish. Even if one becomes blind, reaching out, one touches the nose. The whole body is an eye; touching, one knows the object relies on touch. This is the spirituality of the Heart (Mind), encompassing heaven and earth. Seeing does not rely on eyes; hearing does not rely on ears. If the mind can be pure and clear, not forced by desires and lusts, one knows the original place and returns to the original destination. Ordinary people and sages alike have horizontal eyes and straight noses. Coming together but not returning together, because the former wander outward. If one can retrieve the wandering mind, focusing thoughts on life and death, taking advantage of this healthy body, exerting effort with diligence and mindfulness. Xi Sui returns to the original source; ordinary people and sages return to one.