How do we know that Jethro's advice to Moses was wise?

Jethro, witnessing Moses' heavy load of leadership, offers a practical solution that shares the burden of governance. In Exodus 18:17-24, he advises Moses to appoint capable men to assist him in judging the people's smaller disputes, allowing Moses to focus on the more significant spiritual issues. This wisdom is evident in Moses’ subsequent action; he listens to Jethro and implements his guidance, which not only alleviates pressure on Moses but also equips the leaders of the people for their roles. This suggests that seeking counsel from experienced and wise individuals can significantly benefit those in leadership positions, furthering the efficiency and peace of the community as they serve God.