God often revealed His specific will in situations through the Urim and Thummim. The priests in the Old Testament carried the Urim and Thummim in their pockets. Thummin means perfections or completeness. God wanted the judgments that the priests made on behalf of His people to bring them to holiness, maturity, and completeness. God is a holy God and wants His people to be holy. He wants us to be perfect as He is perfect. He wants us to be mature and complete.
The New Testament is no different. God still commands us to be perfect and complete, lacking in nothing. The Lord says that He who began a good work in us will perfect it or complete it until the day of Christ Jesus (Phil 1:6). Our High Priest is still interested in bringing us to that place of perfection. Our High Priest will use the difficult times in our lives to bring us to that perfection. Consider what James says, that endurance should have its perfect results and that we would be made perfect and complete, lacking in nothing. That was the design and purpose of the Thummim (James 1:2-5).
As we try to discern the will of God for our lives and consider the different paths and options, we need to look at what will cause us to become more like Jesus. What will produce in us more holiness and righteousness? What will cause us to be complete and mature? Often it is not the easiest path that produces more holiness and maturity. In Romans 5:3-4, Paul tells us that we exult in our tribulations because they produce in us, perseverance, proven character, and hope. When Jesus was praying in the garden, He asked the Father to remove the cup from Him. He did not want to suffer on the cross. However, He said, not My will, but Thy will be done. Jesus understood that His suffering on the cross for our sins was the only way to forgive us and sanctify us. It was the only way to produce righteousness and holiness in us. He understood that this was God’s will for Him and for us.