The key to understanding Jupiter in a traditional context is that it is the most temperate of planets. It fills in whatever is lacking in every situation, and so it it can be defined best by negatives. It is the absence of strife and poverty, the absence of ignorance and disorder, the negation of sorrow and weakness.
Things embodying Jupiter are often subtle because they are gentle; they are like the Air– the element most aligned with the planet. It is invisible except through indirect influences, and easily taken for granted unless during a gale or in a vacuum.
Under even minimally favorable circumstances, Jupiter keeps things going just fine and dandy, and everyone mistakenly thinks this is simple normalcy.
It is the Greater Benefic at its most magnanimous.