Aeschylus (525 BC-456 BC)

Aeschylus was an ancient Greek tragedian often described as the father of tragedy. Academic knowledge of the genre begins with his work, and understanding of earlier Greek tragedy is largely based on inferences made from reading his surviving plays. According to Aristotle, he expanded the number of characters in the theatre and allowed conflict among them. Formerly, characters interacted only with the chorus.

Quotes

He who learns must suffer. And even in our sleep pain that cannot forget falls drop by drop upon the heart, and in our own despair, against our will, comes wisdom to us by the awful grace of God.
O Death the Healer, scorn thou not, I pray,
To come to me: of cureless ills thou art
The one physician. Pain lays not its touch
Upon a corpse.
I would far rather be ignorant than wise in the foreboding of evil.
He who learns must suffer, and, even in our sleep, pain that cannot forget falls drop by drop upon the heart, and in our own despair, against our will, comes wisdom to us by the awful grace of God.
For somehow this is tyranny's disease, to trust no friends.

Trust
Words are the physicians of the mind diseased.

Language
Time as he grows old teaches all things.
It is in the character of very few men to honor without envy a friend who has prospered.

Jealousy
Only when man's life comes to its end in prosperity can one call that man happy.
Death is better, a milder fate than tyranny.

Death
I know how men in exile feed on dreams of hope.

Dreams, Hope
Destiny waits alike for the free man as well as for him enslaved by another's might.

Destiny
His resolve is not to seem, but to be, the best.
It is a profitable thing, if one is wise, to seem foolish.
In war, truth is the first casualty.