Hesiod

A bad neighbor is a misfortune, as much as a good one is a great blessing.

Often an entire city has suffered because of an evil man.

It is best to do things systematically, since we are only human, and disorder is our worst enemy.

The dawn speeds a man on his journey, and speeds him too in his work.

Observe due measure, for right timing is in all things the most important factor.

Do not seek evil gains; evil gains are the equivalent of disaster.

He harms himself who does harm to another, and the evil plan is most harmful to the planner.

- Hesiod