The Urim and Thummim, meaning "Lights and Perfections," were placed in the breastplate to discern God's will. Scholars disagree on what they were. Some, like Ellicott, argue they were distinct objects placed inside the breastplate's pouch. Others, like Gill and Henry, believe they were the twelve engraved gems themselves, which would somehow signal God's answer. Though their form is a mystery, their function as a tool for divine guidance is clear.