Purpose of Sanders

I think the purpose was to inform that we should focus on what we can do now for the world to strive for sustaiablility. The first example is when the son told his father what was bothering him. He told his father that he had no hope. I think that is what the people in our world think about the environment. That we wont be able to change it all so why do anything about it. I think the story is telling us to live and do what we can do today. Have hope that we can conquer anything.