...Perses, hear me out on justice, and take what I have to say to heart; cease thinking of violence. For the son of Kronos, Zeus, has ordained this law to men: that fishes and wild beasts and winged birds should devour one another, since there is no justice in them; but to mankind he gave justice which proves for the best.
HesiodInvite your friend to a feast, but leave your enemy alone; and especially invite the one who lives near you.
HesiodNeither make thy friend equal to a brother; but if thou shalt have made him so, be not the first to do him wrong.
Hesiod