If you're talking about "lucid" dreaming, it's a state where the dreamer is aware that they are dreaming and they are self aware. Some have developed a skill for controlling their dreams.
The animated film, "Waking Life," seems to be nothing but one lucid dream after another -- a perpetual stream of consciousness. And from the story line, it seems to be an after-death experience. Heavy stuff.
Another thought-provoking film that touches on lucid consciousness beyond our normal living world is "What Dreams May Come."
Both movies evoke greater awareness of who we are and what we're thinking.
Beyond conscious dreaming is a state of spiritual awakening where the true self (soul, child of God, Holy Spirit) is no longer caught in darkness of the perpetual dream, but can see without human eyes and is conscious without the need for a human brain. That's the everlasting life of which Christ spoke.