From the beginning of time human beings imagine creatures that were stronger, better then they are. Creatures who posses powers that they did not have, like flying, ability to run faster then any animal, see at night and so on. They created gods to possess those powers that they could not have, and allow the gods to bestow those powers to them. We all know the legends and myth where mortal hero receives immortal powers of supper human strength, ability to fly, immortality and others. One of my personal favorite examples from this early era of immortality giving is Tithonus. Trojan by birth, who obtains his immortality when his lover Eos asked for it from the Zeus himself. She did unfortunately forget to ask for immortal youth, so Tithonus aged but did not die. Most of the Greek gods had a cruel streak in them; I guess they represented the humans who invision them. Greek mythology is full of those kinds of cruelty and full of mortal humans becoming immortal gods or semigods. All of us are familiar with the story of Herculies, half god, half mortal who through his legendary deeds achieved his place in the Olympia and immortality with it.
