Physical immortality through moral living
From Kook Science
Physical immortality through moral living is the idea that life can be prolonged indefinitely in this world by living in a strict adherence with a particular moral doctrine. It may further include a concept of disease as being of a moral character, and consequently that disease (and death) must be overcome through moral and religious acts, such as prayer, fasting, or forms of ritual purification, often to the exclusion of medicine or others form of treatment.
Adherents to such philosophies have included Rev. Dr. Alexander McDaniel and "Live-Forever" Jones (1797-1868). It is said that Empedocles of Akragas (c. 490-430 BC) had similar beliefs, asserting he had attained godhood by conforming to certain moral conduct.