Hexagram 48: 井

jǐng —the well, wellspring, spring; resource-ful

By Augustin Chan · Last updated 2025

Upper TrigramWater

Lower TrigramWind

Judgment

井jǐngthe well, wellspring, spring; resource-ful

改gǎito change, alter, rearrange, reorganize

邑yìthe town, village, settlement, community

不bùis not; does, will not; without; rather than

改gǎito change, alter; rearrange, reorganize

井jǐngthe well, wellspring, spring, source

無wúneither; regardless of; without; neither

喪sànglosing; loss; foregone; lost

無wúnor; regardless of; or; nor

得dégaining; gain; secured; found

往wǎngin, whether going; leaving; departing

來láior coming; arriving; approaching

井jǐngthe well

井jǐngis the well

汔qìto almost, nearly, just about to, be about to

至zhìreach, arrive, attain, succeed, consummate

亦yìand but then; and yet

未wèito fall, come up short in, with

繘yùrope; the rope

井jǐngthe well('s); of the well

羸léior to break, damage, ruin; entangle, upset

其qíits, the, that

瓶píngbucket, jug, jar, pitcher is; could, would be

凶xiōngunfortunate, disappointing, unlucky, sad

The Well. You can change the village but not the well. It neither decreases nor increases. They come and go and draw from the well. If the rope doesn't reach the water, or the jug breaks, misfortune.

Image

木mùthe wood

上shàngover, above, on top of

有yǒuis, there is

水shuǐthe water

井jǐngthe well

君jūnnoble, worthy, honored

子zǐyoung one, heir, disciple

以yǐaccordingly, therefore, thus

勞láoworks, labors, toils for, so that

民mínthe people, others, multitude, humanity

勸quànto encourage; urging, encouraging

相xiāngeach other; reciprocity, cooperation

Water over wood: the image of the Well. The superior man encourages people in their work and teaches them how to help each other.

Information Theorem

Claude Shannon - A Mathematical Theory of Communication

Claude Shannon (1948)

In July 1948, Claude Shannon published 'A Mathematical Theory of Communication' in the Bell System Technical Journal, creating information theory and defining the digital age. Before Shannon, 'information' was vague—news, knowledge, meaning. After Shannon, information became measurable in bits. His key insight: separate message from meaning. Information isn't what's said but what could be said. A message carries information proportional to its surprise—complete certainty carries none. Shannon quantified this with entropy: H = -Σ p(x)log₂p(x), measuring degrees of freedom, possible states, the space of what-could-be. From this foundation came compression algorithms, error correction, channel capacity, the bit itself. Hexagram 48 is The Well (井)—water over wood, the inexhaustible source communities draw from without depletion. Shannon created the well the digital world draws from daily: mathematical proof that you can communicate perfectly through imperfect channels by adding right redundancy. Seventy-seven years later, every protocol designer returns to the same source. The well doesn't run dry.

Historical Context

Period: Zhou Dynasty
Oracle Bone Etymology: Water (☵) sits above, Wood (☴) sits below—water drawn up from wooden well.
Traditional Use: The well is the village's inexhaustible source. Dynasties change, villages move, but the well remains. It nourishes everyone who draws from it without being depleted. The classical teaching: maintain the well, keep it clear, and it serves indefinitely.

Lines

Line 1: 井泥不食舊井無禽

井jǐngthe well('s)

泥nímud; is muddy

不bùis not, less than; and not

食shíconsumed; nourish, refresh

舊jiùan, the old, ancient, classic

井jǐngwell

無wúwith, having, has nothing, not much

禽qínto hunt for, catch, capture, take from

Line 2: 井谷射鮒甕敝漏

井jǐngthe well

谷gǔis empty, down low; impractical

射shèaim, shoot at, for

鮒fùthe fish, perch, carp

甕wèngthe, its earthen bucket, jar, urn, pitcher

敝bìis cracked, broken, worn out, damaged

漏lòuand leaking, leaky, dripping, trickling

Line 3: 井渫不食為我心惻可用汲王明並受其福

井jǐngthe well is, has been merely, only

渫xièturbid, unsettled, muddy; cleaned, cleared

不bùbut nothing; there is no

食shíis consumed; nourish, refresh, ment

為wéimaking; causing, producing, becoming

我wǒour, my

心xīnheart(s); heart's, heart's; feelings, affections

惻cèsad; sorry; sadness, sorrow, grief, pity, pain

可kěit is suitable, sufficient, fit, alright, tolerable

用yòngto use, exploit, produce; and available

汲jíand to draw, gather, take from, upon

王wángwere the sovereign, king, ruler

明míngmade clear, aware; enlightened, informed

並bìngall, many; all together could, might, would

受shòureceive, enjoy, accept, inherit, be given

其qíin, of, from its, this; these

福fúenrichment, abundance; gifts, blessings

Line 4: 井甃無咎

井jǐngthe well is being

甃zhòure- lined, tiled, bricked, furbished

無wúno; not; nothing; without, with no

咎jiùblame; is wrong; a mistake, an error

Line 5: 井洌寒泉食

井jǐngthe well

洌lièis, has a clear, pure, limpid

寒háncold, icy, cool, chilly

泉quánspring, fountain, source

食shíto drink, draw from, upon; partake in

Line 6: 井收勿幕有孚元吉

井jǐngas, when a, the well

收shōucomes in, fills up; is received in full

勿wùdo not, don't

幕mùcover, cap, restrict, hide, tent it, this

有yǒubeing, holding, staying; having, finding

孚fútrue, sincere, confident, assured, truth, etc.

元yuánis most, supremely, extremely

吉jípromising, auspicious, fortunate, timely

Practical Guidance

Engineering organizations can't keep redefining foundations. Teams change, products evolve, stacks shift—but you need stable abstractions everyone relies on. The well principle: build the source right once, let everyone draw indefinitely. Shannon's information theory is the platonic ideal. Seventy-five years later, every compression codec, error-correction scheme, channel capacity calculation draws from those 1948 equations. No bugs in Shannon's math. The well was built right. In your codebase, the well is your foundational library. Core abstractions that don't thrash quarterly. When designing these layers, you're digging a well your team will draw from daily. The text warns: if the rope doesn't reach the water, misfortune. Beautiful abstractions that are too hard to access fail. Shannon made theorems usable—elegant equations, clear notation, practical examples. Interface matters as much as depth. If the jug breaks, misfortune. When foundational layers fail (broken error-handling, violated API contracts, memory leaks), everyone depending on them fails. Integrity isn't optional. You can change the village but not the well. Products pivot, teams reorganize, companies get acquired. But core protocols, fundamental data structures, essential algorithms—these stay stable. Shannon published in 1948; telecom engineers in 2025 still reference the same theorems. What people miss: the well isn't static, it's maintained. Shannon's framework is stable, but implementations improve (LDPC codes, turbo codes, modern compression—all within Shannon's bounds). Your core library should be stable, not frozen. Bug fixes and better interfaces are valid. Essential abstractions shouldn't thrash. Identify what in your system should be a well. What abstraction is fundamental enough to remain stable while everything else changes? What's your Shannon entropy formula—the core insight everyone will reference for the next decade? Build that layer with Shannon's care. Make it correct, accessible, inexhaustible. Let your team draw from it daily without worry. The well serves because it's reliably there.

Transformations

When changing lines appear in a reading, this hexagram can transform into another.

21Biting Through6 changinglines 25Innocence5 changinglines 27Nourishment5 changinglines 30The Clinging5 changinglines 35Progress5 changinglines 38Opposition5 changinglines 51The Arousing5 changinglines 10Treading4 changinglines

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