Urim and Thummim, lights and perfections, are the inner faculty of knowing that sits over the heart, the seat of feeling where truth is weighed before it is spoken. Worn on the chest, they place discernment at the center of the body rather than in the reasoning head, so that judgment rises from the heart's own light. The high priest carrying the tribes on his heart is the ruling awareness holding every scattered power of a person in balance, continually, as it turns inward toward its own source.
Breastplate: the chest, the seat of feeling where truth is measured
Urim and Thummim: the inner light and perfection, the faculty of knowing that judges from the heart
Heart: the center of the body where discernment lives, not the calculating head