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A tour through one very old, very sticky typology — and why we don't use it as one.
The idea that people come in four types — sanguine, choleric, melancholic, phlegmatic — is one of the oldest and most durable in Western thought. It descends from ancient Greek and Roman medicine, where the four temperaments were tied to four bodily humours, and it has been rediscovered and rebranded many times since, right up to today's personality quizzes.
Two things are worth keeping straight. First, the humoral medicine the scheme rested on was mistaken; nobody today thinks your character is set by black bile. Second, and more useful, the ancients who wrote about temperament were usually describing tendencies and mixtures, not sorting people into four sealed boxes. The caricature of the neat four-way personality test is a modern flattening of a subtler, older idea.
Inner Axis keeps the interest and drops the sorting. Where it draws on a 20th-century interpretive frame — the Jungian archetypes, for instance — it marks that material plainly as a lens, a way of reading your answers for colour and resonance, and never as a measurement of who you are. An old idea can be good company without being treated as a diagnosis.