As a philologist, Nietzsche's interest, very naturally, was fixed upon the literature of Greece and Rome, and so it was but natural that his first tests of Schopenhauer's doctrines should be made in that field. Some time before this, he had asked himself (as many another man had asked before him) why it was that the ancient Greeks, who were an efficient and vigorous people, living in a green and sunny land, should so delight in gloomy tragedies. One would fancy that a Greek, when he set out to spend a pleasant afternoon, would seek entertainment that was frivolous and gay. But instead, he often preferred to see one of the plays of Thespis, Æschylus, Phrynichus or Pratinus, in which the heroes fought hopeless battles with fate and died miserably, in wretchedness and despair. Nietzsche concluded that the Greeks had this liking for tragedy because it seemed to them to set forth, truthfully and understandably, the conditions of life as they found it: that it appeared to them as a reasonable and accurate picture of human existence. The gods ordered the drama on the real stage of the world; the dramatist ordered the drama on the mimic stage of the theatre--and the latter attained credibility and verisimilitude in proportion as it approached an exact imitation or reproduction of the former. Nietzsche saw that this quality of realism was the essence of all stage plays. "Only insofar as the dramatist," he said, "coalesces with the primordial dramatist of the world, does he reach the true function of his craft."[2] "Man posits himself as the standard.... A race cannot do otherwise than thus acquiesce in itself."[3] In other words, man is interested in nothing whatever that has no bearing upon his own fate: he himself is his own hero. Thus the ancient Greeks were fond of tragedy because it reflected their life in miniature. In the mighty warriors who stalked the boards and defied the gods each Greek recognized himself. In the conflicts on the stage he saw replicas of that titanic conflict which seemed to him to be the eternal essence of human existence. But why did the Greeks regard life as a conflict? In seeking an answer to this Nietzsche studied the growth of their civilization and of their race ideas. These race ideas, as among all other peoples, were visualized and crystallized in the qualities, virtues and opinions attributed to the racial gods. Therefore, Nietzsche undertook an inquiry into the nature of the gods set up by the Greeks, and particularly into the nature of the two gods who controlled the general scheme of Greek life, and, in consequence, of Greek art,--for art, as we have seen, is nothing more or less than a race's view or opinion of itself, i.e. an expression of the things it sees and the conclusions it draws when it observes and considers itself. These gods were Apollo and Dionysus.