But, like the Egyptian, the Sumerian could not conceive of life except under visible and concrete form. The abstract was still embedded, as it were, in the concrete; it could not be divorced from it in thought any more than in those pictorial characters which were used by the scribes. What we mean by "force" would have been unintelligible to the primitive Babylonian; for him life was something real and material, which had a shape of its own, even though this shape was but an unsubstantial shadow, seen indeed by the eye, but eluding the grasp. At the same time it was more than a shadow, for it possessed all the qualities of the object or person to whom it belonged. It was not life in the abstract, but the counterpart of an individual object, which endowed that object with the power of motion, and gave it a place in the animate world.
The Sumerian Zi, therefore, closely resembled the Egyptian Ka. The human Zi was the imperishable part of man; it made him a living soul while he was in this world, and after death continued to represent him in the shadowy world below.(216) Unlike the _lilla_ or "ghost," it represented the man himself in his personality; if that personality were destroyed, it also ceased to exist. While on the one side it was the Zi which gave man life and the power of movement, on the other side, without the individual man there could be no individual Zi. Food and drink were offered to the Babylonian dead as they were to the Egyptian, and the objects the dead man had loved during his lifetime were deposited in his grave. His seal was attached to his wrist, his spear or staff was laid at his side, and at times even dates or fish or poultry were buried with him, lest he might feel hungry in the darkness of the tomb. The child had his favourite toys to play with, the woman her necklace of beads. The water-jar was there, filled with "the pure water" for which the dead thirsted, along with the bowl of clay or bronze out of which it might be drunk. "A garment to clothe him," says an old hymn, "and shoes for his feet, a girdle for his loins and a water-skin for drinking, and food for his journey have I given him."(217)
Like men, the gods too had each his Zi. We hear of the Zi of Ea, the god of the deep;(218) and the primeval "mother, who had begotten heaven and earth," was Zi-kum or Zi-kura, "the life of heaven" and "earth."(219)