God is our Healer. The lesson shows us that God is our healer by referring to Exodus 15:16-22 when Moses and the Israelites parted from the Red Sea and came to a place called Marah where the water was bitter and the Lord through Moses healed the bitter water into sweet water.
The lesson teaches us that God is the one who is able to heal us from the greatest disease we have which is sin and that this sin is healed when we believe in the gospel of our Lord and Saviour Jesus Christ.