Plato
428–348 BC · Ancient Greek
Sin is the disorder of the soul: to act unjustly is not merely to wrong another but to corrupt oneself, and the tyrant who does what he wishes is the most wretched of men.
Greek religion had its own vocabulary for moral transgression: hubris was the overreaching of human limits, nemesis the divine correction that followed. Plato inherits this tradition but transforms it philosophically. In the Gorgias, Socrates defends the paradox that it is worse to do injustice than to suffer it, and worse still to escape punishment for injustice than to receive it. His interlocutors find this absurd; Socrates argues it follows from the nature of the soul. The soul that commits injustice is disordered; punishment, by imposing order through pain, is remedial rather than merely retributive. To evade punishment is to remain sick.
The Republic extends this analysis into a systematic psychology. The soul has three parts: reason, spirit, and appetite. Justice in the individual is the condition in which each part performs its proper function and reason governs the others. Injustice, what we might translate as sin, is the condition in which appetite or spirit usurps the ruling function. The tyrant is not a man who gets everything he wants; he is a man enslaved to his worst desires, driven by appetites he cannot satisfy, incapable of genuine friendship or loyalty, internally at war. The apparent freedom of unlimited power conceals an absolute servitude. This is the deepest meaning of the Platonic account: moral wrongdoing is self-destruction.
"It is worse to do injustice than to suffer it."
"The tyrannical man is in the truest sense poor and unsatisfied, and he is full of fears and is full of all sorts of pains."
Plato does not develop a doctrine of original sin or collective guilt; his moral failures are individual and psychological. But his claim that wrongdoing injures the wrongdoer more than the victim, and his identification of sin with soul-disorder rather than rule-violation, become structuring assumptions for Augustine and Aquinas. The Christian tradition will absorb his diagnosis of pride and disordered love while insisting that grace, not philosophical self-discipline, is the remedy.
Key work: Republic