Justice has no independent existence; it results from mutual contracts, and establishes itself wherever there is a mutual engagement to guard against doing or sustaining mutual injury.
EpicurusNatural justice is a compact resulting from expediency by which men seek to prevent one man from injuring others and to protect him from being injured by them.
EpicurusDo not spoil what you have by desiring what you have not; remember that what you now have was once among the things you only hoped for.
Epicurus