Key V:4 When He heard this, Jesus said, "This sickness will not end in death. No, it is for God's glory so that God's Son may be glorified through it."
This is a well-known scripture passage, and many people would have learned it in Sunday School. I myself have read it many times. We say the story is primarily about Lazarus, or it's about Martha and Mary, the crowd of mourners attending the funeral, or even the Pharisees who were standing around observing.