There is no poetry more sublime than this; none more penetrated with the sense of moral law. But still it is wholly Greek in character. The theme is not really the conscience of the sinner but the objective consequence of his crime. "Blood calls for blood," is the poet's text; a man, he says, must pay for what he does. The tragedy is the punishment of the guilty, not his inward sense of sin. Orestes, in fact, who is the subject of the drama with which we are concerned, in a sense was not a sinner at all. He had killed his mother, it is true, but only to avenge his father whom she had murdered, and at the express bidding of Apollo. So far is he from feeling the pangs of conscience that he constantly justifies his act. He suffers, not because he has sinned but because he is involved in the curse of his race. For generations back the house of Atreus had been tainted with blood; murder had called for murder to avenge it; and Orestes, the last descendant, caught in the net of guilt, found that his only possibility of right action lay in a crime. He was bound to avenge his father, the god Apollo had enjoined it; and the avenging of his father meant the murder of his mother. What he commits, then, is a crime, but not a sin; and so it is regarded by the poet. The tragedy, as we have said, centres round an external objective law-- "blood calls for blood." But that is all. Of the internal drama of the soul with God, the division of the man against himself, the remorse, the repentance, the new birth, the giving or withholding of grace--of all this, the essential content of Christian Protestantism, not a trace in the clear and concrete vision of the Greek. The profoundest of the poets of Hellas, dealing with the darkest problem of guilt, is true to the plastic genius of his race. The spirit throws outside itself the law of its own being; by objective external evidence it learns that doing involves suffering; and its moral conviction comes to it only when forced upon it from without by a direct experience of physical evil. Of Aeschylus, the most Hebraic of the Hellenes, it is as true as of the average Greek, that in the Puritan meaning of the phrase he had no sense of sin. And even in treating of him, we must still repeat what we said at the beginning, that the Greek conception of the relation of man to the gods is external and mechanical, not inward and spiritual. Section 10. Mysticism.