Jupiter

Jupiter is the sovereign deity of the Roman order: the lord of the sky, wielder of the thunderbolt, and guarantor of oath, law, and state authority, worshipped on the Capitol as the greatest and best of gods. The comparative tables of the mythographers set him in his triad — the sky his portion, beside the underworld of Pluto and the waters of Neptune — and equate him as a matter of course with the Greek Zeus, whose myths Rome retold under Jupiter's name. The syncretic habit ran outward with empire: at the desert oracle the Egyptians' hidden god was worshipped as Jupiter Ammon, and in Babylonian correspondence the planet-tables give his seat to Marduk.

The iconographic and symbolic register the compendia preserve is remarkably consistent: a seated, venerable figure with staff and spear, standing for organization, decision, expansion, and intellectual will — the energetic and the courageous — with the air for his element, tin for his metal, Thursday for his day, the east for his quarter, and maturity for his age. The symbolists gloss him as judgment and will among the virtues, and heraldry assigns him azure, the blue of his own sky.

His planet carries the same character. Jupiter is the royal planet, the Greater Fortune of the astrologers — pure and clear, the shepherd of the sky, producing abundance, preservation, and expansion, ruler of the love-signs and counted with Venus among the beneficent planets against Saturn and Mars. The reach of that benevolent reputation shows in odd corners of neighboring traditions: a Jewish legend of Abraham's night battle has the planet Jupiter itself made bright to light his way. God, virtue-table, and planet agree in one figure of ordered, expansive sovereignty.

The paragraphs below are extrapolated; no source supports them.

Jupiter reads as authority that has never doubted itself — a personality of decision, magnanimity, and appetite for scale, whose native mode is the decree rather than the scheme. Where his Greek twin's stories run to intrigue and transformation, the Roman register emphasizes office: order, expansion, the confident administration of a sky-wide estate. The composite temperament is generous, commanding, sensual by reputation, and constitutionally incapable of thinking small. Read from his cult and symbolism, and marked as speculation.