Aristotle's Nicomachean Ethics presents a profound and enduring framework for understanding human flourishing, or eudaimonia. Far from a mere academic exercise, Aristotle sought to identify the ultimate good for human beings, arguing that this good is not found in transient pleasures or external goods alone, but in the cultivation of virtue and the exercise of reason. His ethical system is teleological, meaning it is oriented towards an end or purpose, and this ultimate purpose for humanity is eudaimonia, a state of living well and doing well. Aristotle contends that achieving this state requires a lifetime of virtuous activity, guided by practical wisdom.
The core of Aristotelian ethics lies in the concept of virtue (aretē). He distinguishes between intellectual virtues, acquired through teaching and experience (like wisdom and understanding), and moral virtues, acquired through habituation and practice (like courage, temperance, and justice). Moral virtues, for Aristotle, are a mean between two extremes, a "golden mean" determined by reason and practical wisdom. For example, courage is the mean between cowardice and rashness; generosity is the mean between stinginess and extravagance. This mean is not a rigid mathematical average but is relative to the individual and the circumstances. What is courageous for a soldier in battle might be foolhardy for a civilian. The ability to discern this mean in any given situation is the function of practical wisdom, or phronesis. Without phronesis, one cannot truly possess moral virtue, as one would lack the judgment to act appropriately.
Aristotle dedicates considerable attention to explaining how moral virtue is developed. He emphasizes that virtues are not innate; we are not born courageous or temperate. Instead, these dispositions are acquired through repeated action. Just as a musician becomes skilled by practicing their instrument, a person becomes virtuous by repeatedly performing virtuous acts. This process of habituation is crucial, especially in youth, as it shapes character and forms the bedrock of a good life. The legislator's role, therefore, is to encourage virtuous behavior through laws and education, thereby habituating citizens towards the good and making virtue a natural inclination. This practical, hands-on approach to ethics sets it apart from purely theoretical moral systems.
Furthermore, Aristotle recognizes that external goods – such as health, wealth, friends, and good fortune – play a role in achieving eudaimonia, though they are not its essence. While a person can be virtuous in dire circumstances, the full realization of human potential and the exercise of virtue are often facilitated by the presence of these external goods. For instance, one cannot be truly generous without having resources to give, nor can one fully exercise the virtue of friendship without having friends. However, Aristotle cautions against equating happiness with the mere possession of these goods. They are instrumental to living well, not the end itself. A wealthy but vicious person, for Aristotle, would not be considered to be living a eudaimon life.
Finally, eudaimonia is an activity, not a passive state. It is "an activity of the soul in accordance with virtue." This means that a flourishing life is one lived actively, engaging in virtuous actions and exercising one's rational capacities to their fullest. The highest form of human activity, for Aristotle, is contemplation, or theoretical wisdom, as it involves the use of our most divine faculty – reason – in its purest form. However, he acknowledges that a life solely dedicated to contemplation is not feasible for most. Therefore, the practical pursuit of virtue in the civic and personal spheres remains the more accessible and common path to eudaimonia for the majority of people. His ethics, therefore, offers a practical guide for living a meaningful and excellent human life, grounded in reason, habit, and virtuous action.