Dewitt in his "Epicurus and his Philosophy" interprets Principal Doctrine 5 "as follows.
Quote"It is impossible to live pleasurably without living according to reason, honor, and justice, nor to live according to reason, honor, and justice without living pleasurably."
Incidentally, it may be recalled that by reason is meant the practical reason, which guides the individual in every choice between doing and not doing a given thing; by honor is meant the unwritten law that determines the conduct of a gentleman; and by justice is meant obedience to the written laws of the country. (Pg.246)
It seems everyone I've seen agrees with this idea, at least if they have commented on it.
For my part, i actually disagree with this interpretation, largely because Epicurus gives his own definition of Justice in Principal Doctrine 37 especially, which goes beyond simple obedience to the written laws of the country, even saying some laws can be unjust. But i also softly disagree with his take on Wisdom.
QuoteAmong the things accounted just by conventional law, whatever in the needs of mutual association is attested to be useful, is thereby stamped as just, whether or not it be the same for all; and in case any law is made and does not prove suitable to the usefulness of mutual association, then this is no longer just. And should the usefulness which is expressed by the law vary and only for a time correspond with the prior conception, nevertheless for the time being it was just, so long as we do not trouble ourselves about empty words, but look simply at the facts.
Furthermore, one of Epicurus own works seems to hint at a conception of Justice beyond simple obedience to the law, with the working being called "On Just Dealing" (Hicks), with some like White and Bailey going even further in translating it as "On Just Action", which i doubt is just a work that says "just obey the law" for a couple paragraphs straight if the Principal Doctrines are any indication.
With all this in mind, i would like to propose a different interpretation than DeWitt, on Justice especially.
QuoteBy Wisdom is meant making the proper choices and avoidances to live a pleasant life, as well as knowing the truth about various things in order to understand our own world and make proper choices and live pleasantly, such as Tetrapharmakos, necessity of Friendship, knowledge of Nature, the truth of our senses, etc.
By Honor is meant to character of a gentleman, as well as noble lady for our own Kalosyni, this is all the socially acceptable conduct which, even if not technically harming someone, is still seen as socially repugnant, such as a refusal to help others, being greedy, making other people take care of you via your own laziness, if you could help yourself, uncleanliness, or lying outside of harming others, along with other generally shameful practices. Obviously a lot of overlap with Justice here, just as Wisdom overlaps with all the other virtues.
By Justice is meant acting according to what is mutually beneficial for people, not murdering, cheating, stealing, or assaulting, which mostly means obedience to the law, but sometimes means changing the law so that it comes into conformity with what is mutually beneficial.
I hope you all like this, and let me know your thought.