The 6th house governs the unglamorous work that keeps a life functioning: routine, health, and the daily discipline nobody applauds but that everything else depends on.
It's a cadent house, processing the ambitions of the 5th house into sustainable habit, and sits opposite the 12th house, where visible daily structure gives way to whatever stays hidden, unconscious, or quietly surrendered.
The 6th house traditionally covers health and illness, daily work and employment as distinct from career or public vocation, routine, and service, historically including the servants or subordinates a household depended on, and by extension anyone whose competence quietly keeps a larger operation running.
What connects health and daily work in a single house is repetition: neither is decided once, both are maintained or neglected through small, usually unwitnessed choices repeated over ordinary days. Processing the ambitions the 5th house generates into sustainable habit, the 6th house asks whether an idea can actually survive being turned into a routine. Opposite the 12th house, its visible, managed structure stands in direct contrast to whatever isn't managed at all, the unconscious material the 12th house holds instead.