Aeschylus

A god implants in mortal guilt whenever he wants utterly to confound a house.

Neither a life of anarchy nor a life under a despot should you praise. To all that lies in the middle has a god given excellence.

In every tyrant's heart there springs in the end this poison, that he cannot trust a friend.

It is not the oath that makes us believe the man, but the man the oath.

In war, truth is the first casualty.

There is no pain so great as the memory of joy in present grief.

When a match has equal partners then I fear not.

ATHENA: You wish to be called righteous rather than act right. [...] I say, wrong must not win by technicalities.

Willingly no one chooses the yoke of slavery.

He who goes unenvied shall not be admired.

ATHENA: There are two sides to this dispute. I've heard only one half the argument. (...) So you two parties, summon your witnesses, set out your proofs, with sworn evidence to back your stories. Once I've picked the finest men in Athens, I'll return. They'll rule fairly in this case, bound by a sworn oath to act with justice.

The wisest of the wise may err.

It is an easy thing for one whose foot is on the outside of calamity to give advice and to rebuke the sufferer.

[Hermes addresses Prometheus :] To you, the clever and crafty, bitter beyond all bitterness, who has sinned against the gods in bestowing honors upon creatures of a day--to you, thief of fire, I speak.

"Reverence for parents" stands written among the three laws of most revered righteousness.

On me the tempest falls. It does not make me tremble. O holy Mother Earth, O air and sun, behold me. I am wronged.

Justice turns the scale, bringing to some learning through suffering.

Call no man happy till he is dead.

It is best for the wise man not to seem wise.

I would rather be ignorant than knowledgeable of evils.

I willingly speak to those who know, but for those who do not know I forget.