` ` The Simpsons '' co - creator was told he had three to six months to live . Now , he 's still fighting and devoted to giving back . Lisa : This has been one of the most amazing experiences of my life .
`` The Simpsons '' co-creator was told he had three to six months to live . Now , he 's still fighting and devoted to giving back . Simon : Cancer has been one of the most amazing experiences of my life .