The blindfold on Lady Justice is a latecomer, and it started as a joke. Classical and medieval images of Justice show her clear-eyed. The blindfold first shows up around the end of the fifteenth century, most famously in a woodcut for Sebastian Brant's satire Ship of Fools (1494), where a jester is tying it over her eyes. The point was mockery: justice that can't see. Only later did it become a symbol of impartiality. The tarot's Justice never picked it up. In the Waite-Smith deck she looks straight out at you, and that open gaze is the card's first lesson. Fairness starts with seeing clearly, not with refusing to look.
Justice corresponds to Lamed, "ox-goad," the herdsman's prod that keeps the animal on course. It's the tallest letter in the Hebrew alphabet and sits at its exact center. The card's sign is Libra, the scales, and its path runs from Geburah, Severity, to Tiphareth, Beauty. In older decks Justice was card VIII. A. E. Waite moved it to XI, trading places with Strength, so each would line up with the Golden Dawn's zodiac order. The Egyptian goddess Ma'at, who weighed the heart of the dead against a feather, sits in the card's ancestry too. Paul Foster Case read Justice as equilibrium through action, balance kept by constant small corrections. That's exactly what an ox-goad is for.
The scales weigh and the sword decides. Weighing without deciding is endless deliberation, and deciding without weighing is recklessness. Justice holds both, which is why it's the card of cause and effect, of the plain fact that actions have consequences and that the fastest way to change a result is to change what produces it. The small white shoe that peeks from under her robe in Pamela Colman Smith's drawing suggests she's ready to stand up and act.
The shadow is judgment without mercy: self-righteousness, scorekeeping in relationships, a harsh inner critic calling itself conscience. The opposite shadow is refusing to judge at all and letting imbalances pile up. What consequence are you still pretending isn't yours? Are you as fair to yourself as you try to be to others?
This is the card of the honest audit, the overdue conversation, the amends finally made. Courthouses set Justice above their doors so that no one enters without passing under her gaze. Keep her image somewhere you pass every day and she does the same small work: look clearly, weigh honestly, act.