Why is it important the Saul now understands why the Gods Lake belonged to his family?

It is important that Saul understands his roots at Gods Lake because the lake symbolizes the value of personal heritage and family. When Saul decides to make a pilgrimage to Gods Lake as an adult, he has a vision of his family and ancestors. This vision provides him with a new sense of strength in spite of all of the persecution he has faced and allows him to persevere in spite of his personal traumas.