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.
EpicurusYou don't develop courage by being happy in your relationships everyday. You develop it by surviving difficult times and challenging adversity.
EpicurusAgainst other things it is possible to obtain security, but when it comes to death we human beings all live in an unwalled city.
Epicurus