By the high medieval period the three words had been put to work on shields, walls, and the inside flaps of psalters. Bernard of Clairvaux, abbot of the Cistercians from 1115 to 1153, preached on perseverance for forty years and on trust for nearly as long. Thomas Aquinas, writing the Secunda Secundae of the Summa Theologiae between 1271 and 1272, argued that temperance was the virtue that kept the others from collapsing into their own excess. Without it, fortitude becomes recklessness, justice becomes cruelty, and prudence becomes mere cunning. A century later, Christine de Pizan put the same argument more plainly in her Burgundian court treatises: temperance is the bridle on every other good. The metaphor would last another four hundred years.
The bridle and bit at the heart of the shield is the canonical emblem of temperance. The image came from Aristotle's metaphor of reason as charioteer governing the horse of appetite, descended through Cicero's De Officiis of 44 B.C. and adopted into Christian moral theology by Aquinas. Giotto painted Temperantia on the wall of the Scrovegni Chapel in Padua in 1305 with a sheathed and bound sword, her bridle implied by the binding. Cesare Ripa codified the iconography in his Iconologia of 1593, ruling that Temperance must hold a bridle in her right hand. Every educated medieval and Renaissance viewer would have read a bridle on a shield as Temperantia on sight. The vocabulary was that settled.
Why the Three Together
- Hound passant at the head — fiducia, the faithful watcher, drawn from Isidore and the bestiaries.
- Bridle and bit at the fess point — temperantia, the governing hand, codified by Ripa in 1593.
- Triquetra at the base — perseverantia, the unbroken loop, descended from Insular and Norse craft.
- The motto banners — read bottom-left to bottom-right to top, the order of moral development.
- The cape and the rearing horse — context, the unbridled power that the shield's emblem governs.
