The Invocation puts all its stress upon Ulysses and his attempt to save his companions. It says nothing of Telemachus and his youthful experience, nothing of the grand conflict with the suitors. Hence fault has been found with it in various ways. But it singles out the Hero and designates three most important matters concerning him: his knowledge, his suffering, his devotion to his companions. Enough; it has given a start, a light has been put into our hand which beams forward significantly upon the poem, and illumines the mazes of the Hero's character. Mark again the emphatic word in this Invocation; it is the Return (_nostos_), the whole Odyssey is the Return, set forth in many gradations, from the shortest and simplest to the longest and profoundest. The idea of the Return dominates the poem from the start; into this idea is poured the total experience of Ulysses and his companions. The two points between which the Return hovers are also given: the capture of Troy and the Greek world. Not a mere book of travels or adventure is this; it contains an inner restoration corresponding to the outer Return, and the interpreter of the work, if he be true to his function, will trace the interior line of its movement, not neglecting the external side which has also a right to be. _The Obstacles._ Two of these are mentioned and carried back to their mythical sources. All the returning heroes are home from Troy except the chief one, Ulysses, whom Calypso detains in her grot, "wishing him to be her husband;" she, the unmarried, keeps him, the married, from family and country, though he longs to go back to both. She is the daughter of "the evil-minded Atlas," a hoary gigantesque shape of primitive legend, "who knows the depths of all the sea,"--a dark knowledge of an unseen region, from which come many fatalities, as shipwreck for the Greek sailor or earthquake for the volcanic Greek islands; hence he is imagined as "evil-minded" by the Greek mythical fancy, which also makes him the supporter of "the long columns which hold Heaven and Earth apart"--surely a hard task, enough to cause anybody to be in a state of protest and opposition against the happy Gods who have nothing to do but enjoy themselves on Olympus. Sometimes he refuses to hold the long columns for awhile, then comes the earthquake, in which what is below starts heavenward. Of this Atlas, Calypso is the offspring, and possibly her island, "the navel of the sea," is a product of one of his movements underneath the waters.