This controversial chapter might appear at first glance to be speaking about reincarnation, as it does seem to be talking about the idea of rebirth in a way that ordinary people could not understand. However it differs in two significant respects. Firstly, Jesus says that no one can see (verse 3) or enter (verse 5) the kingdom of God unless he is born again - of water and the spirit. However if reincarnation were the only criteria for seeing or entering the kingdom of God, this is hardly worth mentioning - as in the view of most reincarnationists, almost everyone alive even back then would have had many previous incarnations.
However then Jesus goes on in verse 11 to imply that he and his disciples have seen and entered the kingdom of God themselves and they had testified to what they have seen - but how could people without this ability comprehend the heavenly experiences they were talking about?
To understand what Jesus was referring to here, it's useful to have read the works of the greatest Christian mystics to try to find some similarity of experience - as these people are the spiritual descendants of Jesus's disciples. One excellent match we find is in the book by St Catherine of Avila entitled "Interior Castle". In this book, she describes how she visits the spiritual realms in a deep trance. From her description of wildlife and wonderful freedom of travel, this sounds almost exactly like the astral or out-of-body travel practiced for centuries by mystics of all faiths - Jewish, Buddhist, Tibetan, Shaman, etc. Their experiences are often so incredible and difficult to understand for people who cannot experience them that until westerners started writing on this topic over the last 30 years, few westerners would have given it any credibility. Even many orthodox Christians are fascinated by the tales they hear from people who have had the very similar near-death experiences, otherwise known as NDEs.
The last question remains - what has being born of water and the spirit got to do with any of this? In the last few years the technical aspects of out of body travel have been understood far better than before and it is now accepted (at least in metaphysical circles) that in order to astral travel, a person must first use their natural in-built ability of the non-phsyical components of their body to create an "etheric double". This is an identical thinking and feeling copy of the spiritual components of a person. Then through intense meditation or by extreme will-power, the natural bonds holding this duplicate inside the confines of the physical body are relaxed and the etheric double is "projected" out. From there it is free to wander the spirit realms, receiving its power from an infinitely stretchable energy cord which always extends back to the human body. Once the journey finishes for whatever reason (say the person is disturbed or the double returns to the body), the double's memories are usually integrated back into the person, allowing them to remember what happened.
References and further reading:
- Interior Castle (online version) - St Teresa of Avila's relatively short manual on spiritual travel. An amazing gem which has been long overlooked and seldom understood.
- Astral Pulse - the web site of Robert Bruce, veteran mystic, and the western world's leading expert on astral travel. A great deal of his manuals and guides are available free at this site and there are also discussion forums available for people requiring a few extra tips.