Although Aeschylus, like all of his day, was a polytheist, he exalts Zeus far above all other divinities. He regards him as preëminent, the possessor of all majesty and power, whose will always prevails, so that, when he speaks, the thing he wishes comes to pass. The poet uses the highest and most comprehensive epithets of him throughout his plays; in the Supplices the chorus appeal to Zeus as “King of kings, most blessed of the blessed, most perfect power of perfect powers; blessed Zeus”; and again they address him as “the one who rules through infinite time.”[129] In other passages the poet seems to feel as if language were unequal to the task of describing adequately the majesty and power of this supreme god. In his mind Zeus surpasses the other gods so much that his will represents the whole of the divine laws; to him man inevitably turns in doubt and perplexity. As the chorus say in the Agamemnon:

Zeus—whate’er ’Zeus’ expresseth of His essence— If the name please him on the lips of prayer, With his name on my lips I seek his presence, Knowing none else I may with him compare.

Yea, though I ponder, in the balance laying All else, no help save Zeus alone I find, If I would cast aside the burden weighing, All to no profit, ever on my mind.[130]

It is not impossible that Aeschylus cherished ideas of divinity which approached the pantheism or the henotheism of a later age. Clement of Alexandria has preserved two of his verses which are so extraordinary that we are glad to have them attested also by Philodemus.[131] When in these the poet says: “Zeus is the ether, Zeus the earth also; also the sky. Zeus is all things, and that which is above all things as well,” this syncretistic expression may well be due to the influence of Orphism or of the philosopher Heraclitus; but whatever the source of the idea it stands at diameter with popular tradition. Of course it does not exclude the gods of the popular belief, who could be included in the divine unity, as later thought usually conceived them. That Aeschylus uses the gods of the people in his plays is not surprising, for the dramatic poet, whatever his personal belief, must always use material familiar to his audience and suited to his dramatic and poetic purpose.

In the Prometheus Bound the Titan threatens Zeus with Fate and declares that even he cannot escape Necessity. But we must remember that the Prometheus, as I have said before, is a drama which represents transition from the old order to the new, and that at the end of the trilogy there was no conflict between Zeus and Fate; and in general Aeschylus, though not always clear, most often represents Fate either as the will of Zeus himself or as his assistant. The former idea is again and again expressed in the Supplices, where the will of the supreme god is shown as something mighty and absolute which none may transgress.

But if Zeus is exalted to this supreme position, it is as a god of supreme justice. With the poet the ideas of justice and piety, injustice and impiety are equivalent. Like Hesiod he makes Justice the daughter of Zeus, whom Zeus always supports and avenges, “allotting duly ill to the wicked, blessing to the righteous.” To the poet it is inconceivable that a god of perfect justice could desire anything in the world except what is right and just; and therefore he conceives that man’s obligation is to strive after that which is just and righteous, and so to put himself into harmony with the divine will. A failure to do this is sin. Indeed the poet says that when men disregard justice they injure the gods, and more than once sin is spoken of as a disease of the mind. The sinner is a vain creature, laboring under a delusion which oftentimes springs from o’erweening pride and is doomed to bear tears for its fruit. The envy of the gods, which seems in Homer a childish thing, is in Aeschylus only the resentment which they feel toward a sinner who has been led away by success into insolent pride and so is doomed to punishment. In the Persians Xerxes is represented as having been swept away by his haughty insolence so that he lacked discretion (σωφροσύνη) and came to his doom. The shade of Darius says to the chorus:

Zeus sits above, a chastener of thoughts Exceeding proud, a stern inquisitor. Wherefore, since Heaven’s warning bids be prudent, Admonish him with counsel of wise speech To cease from flouting Gods with reckless pride.[132]

And Xerxes’ armies were likewise doomed to pay the price of insolence and of their godless thoughts.

Furthermore Aeschylus teaches that good men must avoid the wicked, and illustrates the truth by the fact that it was evil companions who urged Xerxes to his folly. There is a striking passage in the Septem in which Eteocles, when informed that the seer Amphiaraus is among the heroes who are besieging Thebes, says:

Woe for the omen that with impious men Joineth a righteous man in fellowship! Than evil converse, in all enterprise Nothing is worse; its harvest let none reap. Infatuation’s field hath death for fruit. If the godfearing man for shipmates hath A crew hot-hearted in iniquity, With that god-hated tribe he perisheth: The righteous man who dwells with citizens Traitrous to guests and reckless of the Gods, Is justly taken in the selfsame net, Lashed by the same impartial scourge of God.[133]