The Eternal life is the God kind of life that is infuse into the spirit of man. This life is called zoe. After Adam ate the forbiden fruit, God set an Angel to guide the tree of life otherwise Adam may reach out his hand to eat and live forever like God Genesis 3:22. This tree is again mentioned in Revelation 22:14, Jesus is the way to that tree of life- which represent Eternal life. No one has that life except Jesus Christ. That life was given to Enoch & Elijah, that enable them to be raptured. When Jesus Himself resurrected, it was that life He possessed that enables Him to passed through opaque item or marerials like walls without restrictions. The Eternal life makes you live forever, no death , no pain, It is life without end.