Aeschylus is also the first whose plays still survive; the others are Sophocles and Euripides. He is often described as the father of tragedy: critics and scholars' knowledge of the genre begins with his work, and understanding of earlier tragedies is largely based on inferences from his surviving plays. According to Aristotle, he expanded the number of characters in plays to allow conflict among them whereas characters previously had interacted only with the chorus.
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...Aeschylus
Oh, the torment bred in the race, the grinding scream of death and the stroke that hits the vein, the hemorrhage none can staunch, the grief, the curse no man can bear. But there is a cure in the house, and not outside it, no, not from others but fro...Aeschylus
Alas, poor men, their destiny. When all goes well a shadow will overthrow it. If it be unkind one stroke of a wet sponge wipes all the picture out; and that is far the most unhappy thing of all. -CassandraAeschylus