philosophical theories that offer the definition of intrinsic happiness which successfully portray a direct link between an ethical life and happiness, as their theories are essentially philosophies for identifying with an individual’s own morality – in which ‘true happiness’ arises from. Through thorough analysis of extracts from ‘Ethical Virtue: Aristotle, extract from Nicomachean Ethics’, ‘The Stoics Reader – Selected Writings and Testimonia’, and ‘Epicurus, ‘Letter to Menoeceus’ and ‘Leading Doctrines’’