Memorial stones are used to remember important events and teach future generations about God's acts. The Israelites erected stones as memorials to remember God parting the Jordan River so they could cross. These stones served as reminders of God's power and mercy. Christians also use memorials like baptism, communion, and living holy lives to proclaim God's work and be a light to others. Memorials are meant to be enduring and unmistakable reminders of God for all time and people.