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.
EpicurusWe must meditate on what brings happiness, since when it has, it has everything, and when he misses, we do everything to have it
EpicurusRemember that the future is neither ours nor wholly not ours, so that we may neither count on it as sure to come nor abandon hope of it as certain not to be.
Epicurus