In the Republic it is stated, "Great crimes and pure evil come only from vigorous natures perverted by upbringing; a weak nature never does anything great, good or evil." Teaching an individual from right from wrong, as a child will better the young child into not acting unjust. Teaching them positive things and straying away from negative actions can better help them understand how to act accordingly. To have a just city, teaching the children while young and stemming away from violent actions will have them growing up and being an individual who will act in a certain matter that will help the city be at peace.
A city is only what those living in it make it out to be. In result, this painting shows how teaching the proper knowledge while young, the society will have a better chance an being an ideal city. How an individual thinks and what they have prior knowledge of will determine how they act. Actions speak very loudly, so teaching the children positive information will better the city.