The most important part of education is right training in the nursery. The soul of the child in his play should be trained to that sort of excellence in which, when he grows to manhood, he will have to be perfected.
The greatest penalty of evil-doing is to grow into the likeness of bad men, and, growing like them, to fly from the conversation of the good, and be cut off from them, and cleave to and follow after the company of the bad.
Desires are only the lack of something: and those who have the greatest desires are in a worse condition than those who have none, or very slight ones.
Interference by the three classes with each other s jobs, and interchange of jobs between them, therefore, does the greatest harm to our state, and we are entirely justified in calling it the worst of evils.
Justice in the individual is now defined analogously to justice in the state. The individual is wise and brave in virtue of his reason and spirit respectively: he is disciplined when spirit and appetite are in proper subordination to reason. He is just in virtue of the harmony which exists when all three elements of the mind perform their proper function and so achieve their proper fulfillment; he is unjust when no such harmony exists.