So justice, in a greater scope, is produced when the other three virtues work together in orderly fashion within the state; yet for it to be produced, it must come from everyone doing his assigned function under the excellent guidance of the ruling class. The individual is thus like a miniature state, and justice in the soul is like justice in the state, according to Plato. .
After analyzing justice as it resides in man, and comparing it to the senses within an individual, Plato ultimately defines justice as "minding one's own business" and not meddling with the affairs of others. Plato sets forth the example of a money lender; as long as he does his job, that of lending out money, everything works well. If this money lender decides to abuse his power as such and make extra profit from his doings, such as using his power and influence to create more income for himself in other ways that are not implied in his money lender profession, then things start to breakdown; Plato's ideal system begins to break down. The actions of this money lender would lead him to covet more and more money and property, therefore disrupting the natural order of things, the predesignated roles of each citizen, and bringing down the social hierarchy, thus creating chaos. However, what exactly does Plato mean by not meddling with other peoples' business? His idea of "minding one's own business" can be easily refuted on the surface; what about when it comes to helping, or interest, or connections? If a man were to help his fellow citizen, say a craftsman aided a friend in growing his corn beacuse the friend was sick, would that be considered unjust? .
If the person voluntarily agrees to lend a helping hand to someone else, would that person be acting unjustly? Even if the first person is not directly benefitted by the help he is lending, whilst the latter person is, would it be fair to classify the action as unjust? It is up to each person to decide what to do; it would not be right to deny someone of his right to have his own will, namely the will to mind someone else's affair if both parties agree.