The Secret of the Golden Flower

The Secret of the Golden Flower (Chinese: 太乙金華宗旨; pinyin: Tàiyǐ Jīnhuá Zōngzhǐ) is a Chinese Taoist classic about neidan (inner alchemy) meditation.

The text of The Secret of the Golden Flower is attributed to Lü Dongbin of the late Tang dynasty. It is now known to have originated hundreds of years later, and was first published in the early Qing dynasty (清代前期), circa 1668–1692.

Despite the varieties of impressions, interpretation and opinion expressed by translators, the meditation technique described by The Secret of the Golden Flower is a straightforward, silent method; the book's description of meditation has been characterized as "Zen with details". The meditation technique, set forth in poetic language, reduces to a formula of sitting, breathing, and contemplating.

Sitting primarily relates to a straight posture. Breathing is described in detail, primarily in terms of the esoteric physiology of the path of qi (also known as chi or ki), or breath energy. The energy path associated with breathing has been described as similar to an internal wheel vertically aligned with the spine. When breathing is steady, the wheel turns forward, with breath energy rising in back and descending in front. Bad breathing habits (or bad posture, or even bad thoughts) may cause the wheel not to turn, or move backward, inhibiting the circulation of essential breath energy. In contemplation, one watches thoughts as they arise and recede.

The meditation technique is supplemented by descriptions of affirmations of progress in the course of a daily practice, suggesting stages that could be reached and phenomenon that may be observed such as a feeling of lightness, like floating upward or slight levitation. Such benefits are ascribed to improved internal energy associated with breath energy circulation, improvements that alleviate previously existing impediments. Several drawings portray imagery relevant to the personal evolution of a meditation practitioner, images that may be somewhat confusing in terms of pure rational analysis. "Only after one hundred days of consistent work, only then is the light genuine; only then can one begin to work with the spirit-fire."

...
Wikipedia