27:3 “Died in his own sin” means that he died a natural death. His death fell under the judgment of the entire nation for believing the faithless spies.
27:3, 4 Up to this point, the Hebrew law gave sons alone the right to inherit. The daughters of Zelophehad, having no brothers, came to Moses to ask for their father’s possessions. God told Moses that if a man died without sons, his inheritance would go to his daughters (27:8). But the daughters could keep it only if they married within their own tribe, probably so the territorial lines would remain intact (36:5-12).
27:15-17 Moses asked God to appoint a leader who was capable of directing both external and internal affairs—one who could lead them in battle but who would also care for their needs. The Lord responded by appointing Joshua. Many people want to be known as leaders. Some are very capable of reaching their goals, while others care deeply for the people in their charge. The best leaders are both goal-oriented and people-oriented.
27:15-21 Moses did not want to leave his work without making sure a new leader was ready to replace him. First, he asked God to help him find a replacement. Then, when Joshua was selected, Moses gave him a variety of tasks to ease the transition into his new position. Moses also clearly told the people that Joshua had the authority and the ability to lead the nation. His display of confidence in Joshua was good for both Joshua and the people. To minimize leadership gaps, anyone in a leadership position should train others to carry on the duties should he or she suddenly or eventually have to leave. While you have the opportunity, follow Moses’ pattern: pray, select, develop, and commission.