As Joshua leads the Israelites across the Jordan into the Promised Land, the Jordan splits so the Israelites can cross over – just as it did years before when the Israelites passed through the Red Sea. In commemoration of God’s work, Joshua instructs that a monument be built. We are to remember God’s work in our past, too, and perhaps even memorialize it in a monument, but what God has done is meant to spur us on toward the mission of what will yet do.