Pittacus (c. 640-568 BCE) was one of the Seven Sages of Greece. When the Athenians were about to attack his city, Mytilene (on the island of Lesbos) Pittacus challenged their General to a single combat, with the understanding that the result should decide the war, thus avoiding great bloodshed. The challenge was accepted, and Pittacus killed his enemy with a broad sword. He was chosen as ruler of his city and governed for ten years, during which time he made laws in poetry.
One was: "A crime committed by a person when drunk should receive double the punishment which it would merit if the offender were sober."
"Do not to your neighbor what you would take ill from him."
"Pardon is better than punishment."
"Whatever you do, do it well."
"Power shows the man."
"Do not say beforehand what you are going to do; for if you fail, you will be laughed at."
"Do not reproach a man with his misfortunes, fearing lest Nemesis may overtake you."
"Forbear to speak evil not only of your friends, but also of your enemies."
"Cultivate truth, good faith, experience, cleverness, sociability, and industry."
"Know thy opportunity"