Four as a way of sorting
Faced with a large, shapeless subject, people often divide it into four. The habit is old and shows up in unrelated places: four seasons, four points of the compass, four temperaments, four quarters of a city. Numerology later gathered these examples under the idea that four is the number of structure and organization.
That final step is a belief, and numerology has no demonstrated predictive power. Describing someone as having an organized “four” personality is a claim by modern writers, not a finding. The interesting part is the long record of four-part schemes behind it, and that record is more mixed than the tidy summary suggests.
Seasons, directions and calendars
Anyone living in a temperate climate will notice the year splitting into spring, summer, autumn and winter, anchored by the solstices and equinoxes. The scheme is familiar enough to seem natural, yet it is not universal. Some regions recognise two seasons, such as wet and dry, and traditional Indian reckoning counts six. Even the four-season year, then, is a choice made by particular cultures, and it features in many calendar systems as a convenient way to divide time.
The compass works similarly. North, east, south and west come from the sun’s path and from the stars, and four winds were named in ancient Greek and Roman practice. Dividing a circle by a cross gives four equal parts, which is a natural thing to do with a drawing tool and a straight edge.
Four-part schemes in thought and learning
Greek medicine and philosophy offer several fours at once. The four elements were paired with four qualities, hot, cold, wet and dry, and later medical writing associated the body with four humors: blood, phlegm, yellow bile and black bile. The humors were attributed to the Hippocratic tradition and developed further by later writers such as Galen, and they gave rise to the four temperaments, sanguine, phlegmatic, choleric and melancholic. These are medieval and ancient theories that modern science has abandoned, but they influenced European thought for many centuries and show four being used as a filing system for the whole body.
Other traditions used four to sort sacred and social knowledge. India’s four Vedas, the Rigveda, Samaveda, Yajurveda and Atharvaveda, are a standard grouping of the oldest Vedic texts. The Hindu yugas, the world ages, are also reckoned as four. Among the Igbo of Nigeria, a four-day market week organised trade, with each day named, and the four-day market week structured the rhythm of community life. Each example has its own meaning and context; they are not branches of one tradition.
Grids and plans
The fourfold division is also literal in the layout of towns. Roman planners laid out military camps and many colonial towns on two crossing main streets, the cardo running north to south and the decumanus east to west, which divided the settlement into four quarters. The Greek planner Hippodamus of Miletus, in the fifth century BCE, is traditionally associated with regular street grids, which are arrangements of right angles and blocks.
Map reading continues the pattern. Quadrants divide a plane into four regions, and a grid of squares gives every location a reference. In another sort of grid, mathematical writing about magic squares includes a famous four-by-four example in Albrecht Durer’s engraving Melencolia I from 1514, in which rows, columns and diagonals sum to the same total. A four-by-four square has sixteen cells, and its appeal as a puzzle shows that people have long enjoyed squares as ordered patterns.
How numerology extended the idea
By the twentieth century, numerology authors writing about four had plenty of material to draw on. Four was already a number of the compass, the seasons, the elements and the square. It was natural for them to say that the number represented order and method, and that a person with four in their chart would be systematic, tidy and good with detail. The step from a list of cultural examples to a personality trait is an assertion by those authors; none of the historical examples involves a person’s date of birth or name.
Some writers of numerology gave the label “the builder” or “the organizer” to four, an echo of the town-plan and foundation images above. Others, using other planetary partners, described it very differently, so the organization reading is not a settled part of the tradition.
Reading the pattern with care
There is a risk of seeing four everywhere once you look for it. Three, five, six, seven and twelve also appear in many sorting systems, and the examples above were selected because they fit. The Hindu yugas, for example, are four in one count, but other systems divide time very differently. When a number is as small as four, many things will come in fours by chance, since dividing something in half twice is the simplest way to get a systematic division.
Four does have a real history as a number for arranging and dividing, and that is worth knowing. It does not follow that the number has any influence on how orderly any individual is. The descriptive history is solid in places and loose in others, and the personality claim sits entirely on the loose side.