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Now brothers and intimate companions have all in common, but

other people have their property separate, and some have more in

common and others less, because the Friendships likewise differ

in degree. So too do the various principles of Justice involved,

not being the same between parents and children as between

brothers, nor between companions as between fellow-citizens

merely, and so on of all the other conceivable Friendships.

Different also are the principles of Injustice as regards these

different grades, and the acts become intensified by being done

to friends; for instance, it is worse to rob your companion than

one who is merely a fellow-citizen; to refuse help to a brother

than to a stranger; and to strike your father than any one else.

So then the Justice naturally increases with the degree of

Friendship, as being between the same parties and of equal

extent.