This quote shows how if your a tiger then you live in a jungle and Pi fights just like tigers in the jungle. Since Richard Parker is the savage side of Pi then Pi is in a jungle and he must fight or run into death.
Tiger - One of the most beautiful photographs of one of the most beautiful animals I've ever seen. It just makes me want to reach out and throw my arms around this big cat. Kudos to the photographer. Tiger by Mark B, via