Essential Dignity (The Five Dignities)

Essential dignity, codified by Ptolemy and refined by medieval astrologers, is a layered system rather than a single score. Strongest to weakest: Rulership / Domicile (planet in its own sign, full authority); Exaltation (peak expression, refined but can overreach); Triplicity (elemental affinity, reliable modest support); Term / Bound (degree-based Egyptian lord, subtle modifier); Face / Decan (10° segment rulership, faintest). The debility counterparts: Detriment (opposite sign, against its nature); Fall (opposite exaltation, humbled); Peregrine (no dignity at all, wandering). A practitioner reads all five in layers — a planet can be peregrine in rulership terms yet still gain triplicity strength.

A planet with strong essential dignity expresses itself naturally; a peregrine or fallen planet works but requires more effort. This is why two people with the same Sun sign can have wildly different relationships with that Sun.