What was the Urim and the Thummin?


 Also put the Urim and the Thummim in the breastpiece, so they may be over Aaron’s heart whenever he enters the presence of the Lord. Thus Aaron will always bear the means of making decisions for the Israelites over his heart before the Lord. Exodus 28:30
            The Urim and Thummin were used to make decisions, sort of like casting lots, throwing dice or flipping a coin.  It trusted God with the outcome, not considering it random, but divinely revealed.  There isn’t a lot written about these tools, so they’re very much a mystery.