The Highest Good Is Like Water: The Nourishing Virtue of Yushui and How Heaven-One Begets Water
This article offers a deep reading of Yushui (Rain Water) among the Twenty-Four Solar Terms, drawing on pre-Qin Confucian and Daoist philosophy, etymology, and astronomical phenology. Through an examination of the original meanings of the characters "雨" (rain) and "水" (water), the astronomical positioning of the sun at 330° of celestial longitude, and the three phenological signs of the term, combined with Laozi's teaching that 'the highest good is like water,' Guanzi's view of water as the origin of all things, and the Book of Changes' vision of Heaven-One begetting water and clouds moving to bring forth rain, the essay reveals the virtue of water and the meaning—between Heaven and humanity—of spring rain nourishing all things.
Chapter 17 Snow Gradually Turning to Rain: The Transformation of Life from Congealment to Flow
1. Snow and Rain: Two Forms of Water
The most direct and central phenological characteristic of the Yushui solar term is "snow gradually turning to rain"—as temperatures rise, the water descending from Heaven gradually shifts from winter's snow to spring's rain. This seemingly simple transformation of state contains an exceedingly profound philosophy of life.
Snow and rain are, in essence, two forms of one and the same thing—water. Snow is congealed water, rain is flowing water; snow is water in its solid state, rain is water in its liquid state. Physically, the difference between the two is merely a difference of state caused by temperature. But philosophically, this difference of state symbolizes two utterly distinct states of life: congealment and flow, deathly stillness and vivacity, latency and manifestation.
In winter, water exists in the form of snow—congealed, rigid, and still, deeply "storing away" its vital force. This "storage" is not death, but accumulation, the gathering of energy for the coming year's germination (as discussed earlier regarding "the storage aspect of the virtue of water"). During the Yushui season, temperatures rise, and that congealed snow turns once more into flowing rain—water passes from a state of "storage" into a state of "manifestation," from congealed stillness into flowing vivacity. This process of "snow gradually turning to rain" is precisely the transformation of vital force from latency into manifestation, from accumulation into activation.
Why does this transformation matter so much that it should become the very core of a solar term$3 Because it marks the "restarting" of vital force between Heaven and Earth. Throughout the winter, vital force was "stored" within snow, ice, seeds, and root systems, in a latent, motionless state. During the Yushui solar term, that stored vital force is reactivated through "snow gradually turning to rain"—through water's transformation from congealment to flow. The flowing spring rain awakens dormant seeds, rouses hibernating roots, and activates all things that had lain sleeping. "Snow gradually turning to rain" is thus not merely a meteorological phenomenon, but the master switch for the annual "restarting" of the vital force of Heaven and Earth.
2. Flow: The Essential Character of Life
What "snow gradually turning to rain" reveals at its core is "flow"—water passing from congealed stillness into vivacious flow. And "flow," precisely, is the most essential character of life.
Why is flow the essence of life$4 Because every process of life is, in essence, a process of "flow." Blood flows through the body, nutrients flow through plants, breath flows through respiration, water flows through Heaven and Earth (evaporating into cloud, falling as rain, converging into the sea, evaporating once more into cloud). Flow means circulation, means metabolism, means ceaseless generation. Congealment, stagnation, and the absence of flow, by contrast, mean death—a rigid corpse, withered vegetation, frozen dead water: none of these is anything but a state of "no flow." As discussed earlier, Laozi says, "the hard and strong belong to the company of death, and the soft and weak belong to the company of life"—the soft and weak (capable of flow) belong to life, while the hard and strong (incapable of flow) belong to death.
What the Yushui solar term marks is precisely water's transformation from "no flow" (snow, ice) to "flow" (rain, streams)—that is, the transformation from a state of "death" to a state of "life." Ice and snow melt, streams revive, spring rain arrives—the water of Heaven and Earth resumes its flow, "never ceasing day or night." And the flow of water, in turn, sets the ten thousand things flowing as well: seeds begin absorbing water and germinating (flow), plants and trees begin sending out new shoots (flow), the wild geese begin migrating north (flow), fish begin swimming actively (flow). The whole of Heaven and Earth passes from winter's "congealed stillness" back into spring's "flowing vivacity." The Yushui solar term is the great turning point at which Heaven and Earth pass from "stillness" to "motion," from "death" to "life"—and the leading role in this turning point is played precisely by that water which transforms from congealed snow into flowing rain.
3. From Winter to Spring: Yushui Within the Cycle of the Four Seasons
To fully understand the Yushui solar term, we must grasp it within the larger framework of the cycle of the four seasons. Chapter Seven, in discussing the Twelve Sovereign Hexagrams and the hexagrams Jiji and Weiji, already touched upon this cyclical cosmology; here let us offer a summary specifically of Yushui's position within this cycle.
The cycle of the four seasons is an eternal recurrence of "generation—growth—harvest—storage": spring generates, summer grows, autumn harvests, winter stores. Winter is the utmost extreme of "storage"—all things withdraw, lie hidden, and accumulate, vital force falling to its lowest point (though not vanishing, but being stored away). The Yushui solar term falls precisely at the crucial link in the transition from winter's "storage" to spring's "generation." It is the end of "storage," the beginning of "generation"—the turning point at which vital force, from the lowest point of latency, is activated once more, rising anew.
Why is Yushui the crucial point in the transition from "storage" to "generation"$5 Because what drives this transformation is precisely "water." In winter, water, in the form of snow and ice, "stores away" vital force; during the Yushui season, water, in the form of spring rain, "activates" vital force anew. In other words, water is both the vehicle of "storage" (winter's snow and ice storing away vitality) and the activator of "generation" (spring rain rousing all things into life). The Yushui solar term is precisely the moment when water completes this transformation of role, from "storage" to "generation"—it transforms from "ice and snow sealing away vitality" into "spring rain rousing all things into life."
This apprehension of the cycle of the four seasons contains the most profound wisdom of pre-Qin philosophy—it tells us that life and death, storage and generation, stillness and motion, are not absolute opposites, but different links of one and the same eternal cycle. Already contained within winter's "storage" is the seed of spring's "generation" (vital force stored within the snow and ice); already sown within spring's "generation" is the seed that leads back toward winter's "storage" (the cycle recurring, without end). Laozi says, "Reversal is the movement of the Way"—returning (cyclical recurrence) is the manner in which the Way operates. The Yushui solar term is precisely the solemn turning point, within this eternal cycle, of returning from "storage" to "generation." It reminds us: no matter what winter, what latency and stillness we may pass through, vital force will inevitably, through that water which passes from congealment into flow, activate itself and germinate anew—this is the most profound comfort and hope the Yushui solar term offers us, concerning the cycle of life.
4. The "Trustworthiness" of Yushui: The Way of Heaven Keeping Faith
Finally, let us apprehend, through this year-after-year, never-failing transformation of "snow gradually turning to rain," the "trustworthiness" of the Way of Heaven—the Way of Heaven's solemn keeping of faith with life.
What is perhaps most moving about the Yushui solar term is precisely its "trustworthiness." Year after year, no matter how severe the winter endured, once the Yushui season arrives, that congealed snow will inevitably turn into flowing rain, and all things that lay still will inevitably germinate anew. The Way of Heaven never fails to keep its appointment—it always, punctually, lets snow turn to rain when snow should turn to rain, and lets all things germinate when all things should germinate. This year-after-year, never-interrupted "keeping of faith" is precisely the most solemn embodiment of the Way of Heaven's "trustworthiness."
In Chapter Eight, discussing "the wild geese head north," we already apprehended the "trustworthiness" of the natural world—the trustworthiness of the wild geese's punctual return north. And the Yushui solar term itself, as the annual keeping of faith embodied in the transformation of "snow gradually turning to rain," is the very embodiment, in total, of the Way of Heaven's "trustworthiness." The Master says, "What does Heaven ever say$6 Yet the four seasons proceed, and the hundred things are generated"—Heaven says nothing, yet through the punctual operation of the four seasons, through the on-schedule growth of the hundred things, it silently fulfills its promise to life. That Yushui arrives punctually year after year, that snow turns to rain punctually year after year, that all things germinate punctually year after year—all of this is the Way of Heaven fulfilling, through action rather than words, its eternal promise to life.
This apprehension of the Way of Heaven's "trustworthiness" is the fundamental ground on which the ancients found their footing in life. Precisely because they believed the Way of Heaven possessed "trustworthiness"—believed that after severe winter must come spring rain, that after latency must come germination, that snow must eventually turn to rain—the ancients were able to maintain hope through the harshest winters, able to maintain conviction through the lowest points of life. The Yushui solar term, as the solemn fulfillment of the Way of Heaven's "trustworthiness," offers the ancients (and offers us today) the most fundamental conviction about life: the Way of Heaven keeps faith, and generates life without cease; the severe winter must pass, and the spring rain must come. This is the eternal comfort the Yushui solar term offers us, at the deepest level.