Defining Justice?

I'm not sure I agree with Socrates position on what justice is. Socrates claims justice as the rival of wisdom, moderation, and courage and the rival of them (indirectly justice) as the power that each man possess in minding his own business. Justice defined as "the having and doing of one's own and what belongs to oneself" with respect to not meddling in anyone else's business seems really strange to me. It makes some sense, especially in comparison to the definition of injustice "meddling among the classes ... would most correctly be called extreme evil-doing". Even when narrowed down to the individual aspect from the city, justice is described as "to establish the parts of the soul in a relation of master, and being mastered by, one another that is according to nature". I would guess that these strange definitions are due to the fact Socrates can't compare justice to consequences, which is what I would use to define it, but must compare justice to the internal soul. 

I commented on Matt's.