But he does not bring back his companions. These often seem to be lower unheroic phases of human nature, which the hero must throw off in the course of his development. In general, they may be considered to be in him, a part of himself, yet they are real persons too. This rule, however, will not always apply. Still his companions are lost, having "perished by their own folly," while he is saved; the wise man is to live, the unwise to pass away. The pivotal sin committed by Ulysses in Fableland is against Neptune, who is angry because Ulysses put out the eye of his son Polyphemus. So the God, after the affair of the Oxen of the Sun, becomes the grand obstacle to the Return, and helps to keep the hero with Calypso. Such is the mythical statement in which three conceptions seem to blend. (1) Neptune is the purely physical obstacle of the sea, very great in those early days. (2) Nature has her law, and if it be not observed, the penalty follows, when she may be said to be mythically angry. If a man jump down from a high precipice, he violates a law of nature, gravitation, and she executes him on the spot, it may be; she is always angry and quick to punish in such cases; but he may climb down the height and escape. In like manner a man, undertaking to swim across the sea, encounters the wrath of Neptune; but he may construct a ship, and make the voyage. (3) Finally there is the ethical violation: we shall see in the narrative, how Ulysses, after appealing to humanity, becomes himself inhuman and a savage toward Polyphemus, who then curses him and invokes father Neptune with effect. So the God visits upon Ulysses the punishment for his ethical offense, which is the main one after all. In this way Fableland through the story of Polyphemus contains a leading motive of the Ulyssiad, and thereby of the whole Odyssey, and Ulysses is seen to be detained really by his own deed. 8. The general structure of these four Books is simple enough. They form a series of adventures, with three to a Book. Though the connection seems slight on the surface, there are inner threads which bind intimately together the separate adventures; one of the points in any true interpretation is to raise these threads to light. The general movement of the whole may be regarded as threefold: the sensible world (two Books), the supersensible Hades (one Book), the sensible world a second time (one Book). Very significant are these changes, but it is hardly worth while to forecast them here; they must be studied in detail first, then a retrospect can be given, as the contents of the four Books will be present in the reader's mind. We may now say, however, that this sweep from the sensible into the supersensible, and back again to the sensible, has in it the meaning of a soul's experience, and that the second sensible realm here mentioned is very different from the first.