Aristotelian philosophy Aristotelianism Christian ethics Encratism Epicureanism Friday Lenten fare Peripatetic school Peripateticism Platonic philosophy Platonism Pythagoreanism Pythagorism Rechabitism Shakerism Spartan fare Stoic philosophy abstainment abstemiousness abstention abstinence altruistic ethics aretaics asceticism avoidance banyan day casuistry categorical imperative celibacy chastity comparative ethics continence deontology egoistic ethics empiricism eschewal ethical formalism ethical philosophy ethology ethonomics eudaemonics evolutionism fast fish day fruitarianism golden rule gymnosophy hedonism intuitionism moral philosophy nephalism perfectionism plain living refraining refrainment sexual abstinence simple diet situation ethics spare diet teetotalism the pledge total abstinence utilitarianism vegetarianism