Now, The Causes Being Four, It Is

Happiness Is A State Of Activity.

If They Do Not Share Equally Enjoyments And Toils, Those Who Labor Much And Get Little Will Necessarily Complain Of Those Who Labor Little And Receive Or Consume Much. But Indeed There Is Always A Difficulty In Men Living Together And Having All Human Relations In Common, But Especially In Their Having Common Property.

It [justice] Is Complete Virtue In The Fullest Sense, Because It Is The Active Exercise Of Complete Virtue; And It Is Complete Because Its Possessor Can Exercise It In Relation To Another Person, And Not Only By Himself.

Now Property Is Part Of A Household, And The Acquisition Of Property Part Of Household-management; For Neither Life Itself Nor The Good Life Is Possible Without A Certain Minimum Supply Of The Necessities.

Friends Hold A Mirror Up To Each Other; Through That Mirror They Can See Each Other In Ways That Would Not Otherwise Be Accessible To Them, And It Is This Mirroring That Helps Them Improve Themselves As Persons.