The five elements 五行: five phases, two cycles, and one useful character

Earth is the one that breaks the pattern, and it is worth pausing on. It has no season of its own. Classical practice assigns it the last eighteen days of each of the other four, which makes it the hinge rather than a quarter, and it is why every diagram of the five puts Earth in the middle while the other four sit at the compass points. A chart heavy in Earth is a chart that mediates and does not move quickly.

The ten heavenly stems above are simply these five phases taken twice, once in a yang form and once in a yin form. That doubling is the whole reason there are ten stems and not five, and it is what turns five relations into the ten gods.

Each phase produces the next. The classical images are agricultural and physical, and they are meant to be pictured rather than memorized: wood burns into fire, fire leaves ash, ore is dug from the ground, dew condenses on a cold blade, and water is what makes a tree.

The character is 生, to give birth to, and the tradition takes the metaphor seriously in a way English summaries usually do not: generating costs the generator something. The mother is spent on the child. This is why a chart drowning in Resource, the element that generates your day master, is a recognized problem rather than a windfall, and why the classical name for that condition translates roughly as being smothered by one's own mother.

Read the same cycle from the other side and it names the two relations the calculator prints against every pillar: whatever generates your day master is your Resource, and whatever your day master generates is your Output.

The second cycle skips a step, connecting each phase to the one two places along, and it restrains rather than feeds.

克 is routinely rendered as destroying, and that is too strong. The classical sense is to check, to govern, to keep within bounds, the way an embankment governs a river without being at war with it. A chart with no overcoming relations in it is not a lucky chart. It is an unregulated one, and the tradition treats unregulated growth as a defect with the same seriousness it treats suppression.

These two are the other pair of labels on your chart: whatever your day master restrains is your Wealth, and whatever restrains your day master is your Influence, which is the relation the ten gods split into the direct officer and the seven killings.

Almost every English page stops at two cycles. The classical system has four relations, and the missing two are the ones that describe what happens when the balance fails. They come from the medical literature, the Plain Questions of the Yellow Emperor's Inner Canon, and they matter because a chart is diagnosed far more often for excess than for absence.

相乘, over-restraint. The governing phase is so strong that governing becomes crushing. Earth is supposed to dam Water; Earth in excess leaves a dry bed. The relation is the correct one and the dose is wrong, which in a chart reads as a person whose discipline has eaten the thing it was meant to protect.

相侮, insult. The cycle runs backwards. When the phase that is supposed to be restrained grows strong enough, it turns on its governor instead: enough Water and the embankment goes. The Plain Questions states the rule in one line, that a phase in excess restrains what it governs and insults what governs it, and it is the sentence that turns the five elements from a diagram into a system with failure modes.

This is also the honest answer to why a reading cannot be done by counting. Three of one element is not automatically a strength, because past a certain weight the same element starts producing the second failure rather than the first.

Here is the term that carries the most weight in a real reading and gets mangled most often in English. 用神, the useful god, is the element a particular chart needs in order to come into balance. Around it sit 喜神, the elements that help it do its job, and 忌神, the ones that work against it. Together they are what people mean by favorable and unfavorable elements.

Your favorable element is not the element you are. That single confusion is behind most of the bad advice in circulation, the wear-green-because-you-are-Wood school of it. The useful god is chosen only after a separate judgment: is this day master strong or weak in this chart, in this season, with this support?

A weak Wood day master wants Water to feed it and Wood to stand beside it, and finds Metal hostile. A strong Wood day master wants the exact opposite: the Metal that cuts it into shape and the Fire that gives it somewhere to go, while more Water only makes the problem worse. Same element, same person's element, opposite prescriptions. Anything that hands you a favorable color off your birth year alone has skipped the only step that decides the answer.

Practitioners disagree about how to pick the useful god, and the disagreement is old and real; the strength-and-support approach this site follows is one school among several, and pattern-school practice reaches different answers on the same chart. Where our calculator lands, and every weight and threshold it used to get there, is written out in the calculation methodology, which owns that arithmetic so this page does not have to.

The most common thing a person does with a fresh chart is tally it. Two Fire, three Earth, no Water, therefore I lack Water. It is an understandable move and it is not how the method works, for three reasons that are all about weight rather than number.

The month branch outranks everything. The season a person was born into sets whether their element is in its own season, in a supporting one, or out of season entirely, and classical practice gives that one position more weight than the rest of the chart combined. A Fire day master born in the middle of winter is weak with three Fire characters around it.

A rooted character is not the same as a bare one. A stem that sits on a branch carrying its own element is planted; the identical stem elsewhere in the chart is floating. They count the same in a tally and behave nothing alike.

Branches are not single characters. Each of the twelve conceals one to three hidden stems, weighted, so a chart with no visible Water can be carrying a good deal of it inside its branches. The tally sees eight characters. The chart has closer to fifteen.

The day master page works the whole judgment through on one public birth date, arithmetic included, which is the fastest way to see why the tally and the verdict come apart.

The same five phases run the spatial tradition, where each one is assigned a direction, a trigram and a set of rooms, and the practice is about arranging a place rather than reading a person. That is a different application with different rules, and it lives on its own side of the site: the feng shui pages cover the directional five elements, while everything above is the divinatory reading, applied to a birth moment. The same five types are also assigned to faces, which is a third application again, and the one with the least arithmetic in it.

Both rest on the two cycles in the middle of this page. That shared spine is why one birth date can drive a kua number and a bazi chart at the same time without either borrowing anything from the other.

And behind all of them is the older thing the five phases were before anyone read a birth date with them: a scheme for classifying the world, which collects a season, a direction, a color, a taste and a virtue into each of five drawers, and whose first great application was deciding which dynasty had the right to rule. The five elements as a system covers that history, the correspondence table itself, and every entity on this site that carries a phase. This page stays with the mechanics.