Aeschylus

Wisdom comes alone through suffering.

How rare, men with the character to praise a friend’s success without a trace of envy.

It's not the oath that makes the man, but the man the oath.

To the man who himself strives earnestly, God also lends a helping hand.

It is through suffering that learning comes.

Time in its aging course teaches all things... Time brings all things to pass.

It is always in season for old men to learn.

Time brings all things to pass.

Prosperity may be overturned by a shadow.

The mind asleep hath clear vision.

Learn to know thyself and adapt to thyself.

Old men are always young enough to learn, with profit.

He who knows useful things, not many things is wise.

I have found long since that silence is an antidote to harm.

Fear is stronger than arms.

He hears but half who hears one party only.

Everyone's quick to blame the alien.

Exiles feed on hope.

Children are voices of immortality to a man, though he be dead.

Everyone is harsh whose authority is new.

'Tis the nature of all humankind to be discontented with prosperity.

Amid troubles give joyance to your souls while today is yours.

With time modesty dies away in man.

Wrong must not win by technicalities.

The might of necessity brooks no resistance.