Chapter Four: The Lin (Approach) Hexagram of the Book of Changes — "The Firm Gradually Ascends": Spring Approaching above Earth and Lake

I. From the Fu to the Lin Hexagram: One Yang Returns, Two Yangs Gradually Ascend

The Book of Changes (Yijing) is the encyclopedia of pre-Qin thought, containing the most profound insights into the operating principles of the universe. Although the Yijing does not directly discuss the twenty-four solar terms one by one, its system of "twelve sovereign hexagrams" (shi'er xiaoxi gua) corresponds with exquisite precision to the waxing and waning of yin and yang across the twelve months. To truly understand Lesser Cold, one must understand its corresponding hexagram — Lin, the Approach.

What are the "twelve sovereign hexagrams"$27 "Xiao" means yin grows as yang diminishes; "xi" means yang grows as yin diminishes. The ancients assigned twelve hexagrams to the twelve months, and the progression of yin and yang lines from bottom to top in each hexagram traces the complete cycle of yang's birth to flourishing and then waning, and yin's birth to flourishing and then waning:

Eleventh month: Fu (Return) ䷗ — one yang born at the bottom. Twelfth month: Lin (Approach) ䷒ — two yangs gradually ascending. First month: Tai (Peace) ䷊ — three yangs, the "triple yang brings the great beginning." Second month: Dazhuang (Great Strength) ䷡ — four yangs in vigor. Third month: Guai (Breakthrough) ䷪ — five yangs displacing yin. Fourth month: Qian (Heaven) ䷀ — six yangs, pure yang. Then yin begins: Fifth month: Gou (Encounter) ䷫ — one yin born. Sixth month: Dun (Retreat) ䷠ — two yins growing. Seventh month: Pi (Stagnation) ䷋ — three yins and three yangs. Eighth month: Guan (Contemplation) ䷓ — four yins dominant. Ninth month: Bo (Splitting Apart) ䷖ — five yins stripping yang. Tenth month: Kun (Earth) ䷁ — six yins, pure yin.

The eleventh month, which contains the winter solstice, corresponds to the Fu (Return) hexagram — among its six lines, the very bottom line transforms from yin to yang, constituting "the return of the first yang." This is the moment in the year when yang energy first stirs, the first glimmer of life in "spring born at cold's extreme." The celebrated words of the Tuanzhuan (Commentary on the Judgment) for the Fu hexagram — "In Return, do we not see the very heart of Heaven and Earth$28" — are a hymn to this first glimmer: amid the total yin of deepest winter, Heaven and Earth's "heart of ceaseless generation" quietly reveals itself in the single yang of the Fu hexagram.

The twelfth month (the chou month) in which Lesser Cold falls corresponds to the Lin hexagram ䷒. What does Lin look like$29 Its lower trigram is Dui (Lake) and its upper trigram is Kun (Earth), hence it is called "Earth over Lake, Approach." In terms of line imagery, the two bottom lines of Lin are yang and the four upper lines are yin — this is "two yangs gradually ascending."

Place the Fu and Lin hexagrams side by side: Fu has a single yang born at the very bottom; Lin has yang grown to the second line. From the winter solstice (Fu, one yang) to the month of Lesser Cold (Lin, two yangs), yang energy is quietly yet resolutely growing upward. This is the deepest celestial secret of Lesser Cold — during the period when we feel the coldest, the hexagram imagery of the Yijing plainly tells us: yang energy is no longer that solitary sprout it was at the winter solstice; it has "gradually ascended" to two yangs and advances upward with unstoppable momentum.

II. "The Firm Gradually Ascends": The Core Spirit of the Lin Hexagram's Tuanzhuan

The Tuanzhuan of the Lin hexagram opens with its thesis statement: "Approach: the firm gradually ascends. Joyous and yielding, the firm centered and in resonance — great success through correctness; this is the Way of Heaven. When the eighth month comes, there will be misfortune, for the diminishing will not be long delayed."

This passage is the key to understanding both the Lin hexagram and Lesser Cold. Let us examine it sentence by sentence.

"Approach: the firm gradually ascends" (lin, gang jin er zhang). The fundamental image of the Lin hexagram is that the "firm" (yang) is "gradually" (jin, soaking, permeating) "ascending" (zhang, growing). The word jin is chosen with consummate precision. This is not "sudden growth" or "explosive growth" but "gradual ascension" — like water soaking into all things, slowly, silently, yet reaching everywhere, penetrating, spreading, growing. After the winter solstice's first yang, yang energy does not become robust overnight but grows bit by bit, day by day. By the month of the Lin hexagram, which contains Lesser Cold, this gradual ascent has accumulated a second yang line — though outside it is still bitterly cold, underground, yang energy is spreading upward like spring water soaking through the earth, soundless yet forceful.

Why "gradual" rather than "explosive"$30 This reveals the fundamental rhythm of Heaven's Way of generation — the Way of Heaven never generates violently but always with density, gradualism, and perseverance. This accords perfectly with the Most High's (Laozi's) insight: "A whirlwind does not last all morning; a cloudburst does not last all day" (Daodejing, Chapter 23). Whatever comes violently cannot endure; only that continuous, seemingly weak "gradual ascent" constitutes a truly unstoppable force.

"Joyous and yielding, the firm centered and in resonance" — "Joyous" (shuo, interchangeable with yue, joy) refers to the virtue of the lower trigram Dui (Lake), which is "joy"; "yielding" refers to the virtue of the upper trigram Kun (Earth), which is "yielding." Lin's lower joy and upper yielding creates a state of harmonious delight in which the firm yang energy ascends with ease.

"Great success through correctness; this is the Way of Heaven" — Because of these qualities, the Lin hexagram achieves "great success" through "correctness." The Tuanzhuan solemnly declares this to be "the Way of Heaven" — this is Heaven's very law! That yang energy ascends gradually in joyous yielding along the correct path, ultimately leading to great success — this is none other than the fundamental mode of Heaven's operation.

III. "When the Eighth Month Comes, There Will Be Misfortune": An Eternal Warning against the Inevitable Decline of Flourishing

Yet immediately after revealing the glad tidings of yang's gradual ascent, the Tuanzhuan of the Lin hexagram delivers a profoundly meaningful, even austere warning: "When the eighth month comes, there will be misfortune, for the diminishing will not be long delayed."

By the eighth month, danger will arrive — because the retreat of yang energy will not be far off.

What extraordinarily profound, clear-eyed wisdom! At this very moment when the Lin hexagram's yang is in the ascendant — two yangs gradually growing, brimming with upward vitality — the Yijing already reminds us: what flourishes to the utmost must decline. By the eighth month (corresponding to the Guan hexagram, when four yins dominate and yang has been forced into retreat), danger will have arrived. In other words, at the very moment yang energy has just begun its gradual ascent, the sages had already foreseen its inevitable decline and offered this as a warning.

Why throw such "cold water" at the most hopeful moment$31 This is the very essence of the Yijing's dialectical wisdom — it never lets one become complacent in favorable times, nor does it let one sink into despair in adverse times. The Lin hexagram's two ascending yangs appear to present an entirely promising picture, but the Yijing immediately reminds: what goes to the extreme must reverse. Within the present "ascent" the seeds of future "decline" are already planted.

Applied to Lesser Cold, this becomes luminously clear. At the time of Lesser Cold, yang energy ascending underground is cause for great joy; yet simultaneously, Lesser Cold and Greater Cold are the coldest time of year, and the power of yin cold remains supremely dominant — just as in the Lin hexagram, where four yins sit atop two yangs. Through Lin's "when the eighth month comes, there will be misfortune," the ancients warn us: though yang has been born, we must not be overconfident; though the hint of spring has emerged, we must not grow proud. One must, even as yang gradually ascends, anticipate its eventual decline; one must, even as all things are about to revive, remember the iron law of the cycle of flourishing and decline. This clear-eyed vision of "contemplating decline at the very moment of growth" is the most precious element of the Chinese wisdom tradition's "consciousness of concern" (youhuan yishi).

The Xici (Appended Statements, Part II) of the Yijing says: "The noble person, at ease, does not forget danger; in security, does not forget ruin; in well-ordered times, does not forget chaos — thus the person remains safe and the state may be preserved." The Lin hexagram's warning of "misfortune in the eighth month" is precisely this spirit of "not forgetting danger in times of ease," concretely applied to the philosophy of the solar terms.

IV. The Four Virtues of Lin and the Noble Person's "Teaching, Thinking, Embracing, and Protecting"

The Lin hexagram contains not only the Tuanzhuan's grand discourse but also the hexagram statement's and the Xiangzhuan's (Image Commentary's) earnest expectations for the noble person's character. The hexagram statement reads: "Approach: primordial success, beneficial and correct. When the eighth month comes, there will be misfortune." "Primordial success, beneficial and correct" (yuan heng li zhen) is the highest praise in the entire Yijing, originally the "four virtues" of the Qian (Heaven) hexagram; its attribution here to the Lin hexagram shows how highly the sages regarded the image of yang's gradual ascent.

The Daxiang zhuan (Great Image Commentary) of the Lin hexagram then specifies the noble person's proper conduct during the time of Lin — the warmest and most humanely caring statement in the entire hexagram: "Above the lake there is earth: Approach. The noble person thus teaches and reflects without limit, and embraces and protects the people without boundary."

"Above the lake there is earth: Approach" — Earth (Kun) sits above Lake (Dui), the high ground looking down upon the waters below, hence "Approach."

"The noble person thus teaches and reflects without limit, and embraces and protects the people without boundary." The noble person, contemplating this image of the Lin hexagram, undertakes two great tasks: "teaching and reflecting without limit" (jiao si wu qiong) and "embracing and protecting the people without boundary" (rong bao min wu jiang).

"Teaching and reflecting without limit" means that the noble person's instruction and care for the people should, like high ground overlooking lake waters — reaching everywhere without exception — be inexhaustible and untiring. "Embracing and protecting the people without boundary" means that the noble person's tolerance and protection of the people should, like the vast earth bearing all things, know no borders and no end.

Why does the Lin hexagram — this node of yang's gradual ascent — especially emphasize "teaching and reflecting without limit, embracing and protecting without boundary"$32 Because yang's gradual ascent is like the first shoots of a seedling — at its most tender, most in need of care. The Lin hexagram's two yangs, though brimming with vitality, are after all only two, with four yins above, outnumbered and vulnerable. What the noble person perceives in the Lin hexagram is precisely this kind of deep care for all things newly born — tenderly cultivating every newly sprouted good impulse (teaching and reflecting without limit); pouring strength into protecting every vulnerable life (embracing and protecting the people without boundary).

This spirit, applied to human affairs during Lesser Cold, takes on very concrete meaning: at the coldest moment of the year, when all living things face their greatest hardship, is precisely when the vulnerable most need "embracing and protection."