Plato
428–348 BC · Ancient Greek
Happiness belongs to the just soul: the well-ordered life is the only life worth living.
The addresses the question of whether the just life is the happy life, a question put to Socrates by interlocutors who argue that injustice, carried off successfully, yields more advantage than justice. Plato's answer is that happiness, properly understood, is not a matter of external advantage at all but of the soul's internal condition. The happy person is one whose soul is well-ordered, with reason governing spirit and appetite; the miserable person is one in whom appetite or passion has displaced reason from its natural rule.
The tyrant, who seems to represent the highest degree of worldly success, is on Plato's analysis the most wretched of men. He is enslaved to his own desires, which multiply insatiably, and his soul is in a condition of inner war. The philosopher, by contrast, whose desires are governed by the love of wisdom and of the good, lives in a harmony that no external misfortune can destroy. In the , Plato refuses to identify happiness with either pleasure alone or wisdom alone; the good life is a mixed life, in which pleasure is present but ordered by knowledge. The relation between Plato's account of the good and his account of happiness is treated in the chapter on GOOD AND EVIL.
Happiness, on this view, is not a feeling but a condition: the achieved harmony of the soul's parts under the governance of reason. Whether this harmony can be maintained without some external goods and without the favorable circumstances that allow philosophy to flourish is a question that the itself raises through the image of the philosopher who descends from contemplation to serve the city. The bearing of external goods on happiness is taken up more fully by Aristotle.
"The just man is happy, and the unjust miserable."
"No evil can happen to a good man, either in life or after death."
Plato establishes the objective connection between virtue and happiness that the subsequent tradition will largely accept, contest, or attempt to restate. Aristotle will preserve the connection but give it a more naturalistic and empirically grounded form; Augustine will transform it by insisting that only the vision of God, not any natural harmony of the soul, can constitute the happiness for which human beings are finally made.
Key work: Republic