Characteristics Signified

This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.

A characteristic entry records one of the seven qualities of the soul that Ptolemy's Tetrabiblos assigns to specific planets and houses in its own systematic account of astrological psychology, intelligence, mind, morality, sensuality, soul, stability and strength among them, each read from a distinct combination of planetary rulers and chart position rather than from the sun sign alone.

An entry records which planet or planets Ptolemy's text assigns to a characteristic, Mercury for intelligence, Jupiter and the ninth house for morality, Mars and the first house for strength, and states that assignment as Ptolemy's own documented scheme rather than as a claim independent of it, since later astrological writers have not always kept his specific pairings.

Where Ptolemy's own text divides a characteristic further, reading the soul itself as partly rational, governed by Mercury, and partly irrational, governed by the Moon, an entry preserves that internal division rather than flattening it into one single planetary assignment, since the Tetrabiblos treats the soul's structure as itself a substantive claim worth recording precisely, not as incidental detail.

An entry keeps this ancient psychological scheme distinct from modern personality typologies that use similar language, since Ptolemy's own categories answer a specific, documented astrological question about planetary rulership, not a general claim about human character independent of a chart.

This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.

Nicholas Campion's history of Western astrology traces how Ptolemy's own psychological scheme, the planetary rulership of specific mental and moral qualities his Tetrabiblos lays out, was received, copied, argued over and reworked across the many centuries between the Hellenistic world that produced it and the present day, rather than treating that scheme as if it arrived unchanged.

That documented history matters for a characteristic entry because later astrologers did not always keep Ptolemy's own specific pairings intact, and Campion's study records where a later writer's own reworking diverges from the Tetrabiblos, letting an entry state honestly which parts of a characteristic's documented meaning trace directly to Ptolemy's own text and which parts entered through a documented later addition.

Campion's account also situates this scheme within the wider documented history of astrology as a practiced intellectual tradition, its periods of institutional favor and disfavor, its transmission through Arabic and Latin translation, and the modern revival that eventually recovered texts like the Tetrabiblos itself for direct study rather than leaving them known only through later summary.

An entry therefore draws on Campion's history for the documented chain of transmission and reworking, while keeping Ptolemy's own Tetrabiblos as the primary source for the scheme's original content.