[Ifroham4]

The Human brain has a lot of opiate like receptors, and human body does produce opiate analogs based on responce to some nerve stimulus. One example is extreme pain, we do not perceive too much pain, under those circumstances these opiate analogs make sure that we hallucinate. Similar phenomenon has been widely documented in near death experiences. May be meditation elicits one such mental state. But the concept 'I' is more projected as something entirely different from the body, may be those higher mental states can make one feel so detached from oneself, thanks to hallucinations or pseudo complete shutting down of thought process, as correctly pointed out by pradheep objective reality is almost non existance without a concious observer, if it is observed then a concious observer is a must, is the observer the detached 'I'. It is quite possibly that we have souls or its equivalents that define the 'I' and beyond, but we do not have any proofs for that, this brings into the picture what the I does after death, is the 'I' only for humans, what about the other living things, including plants ?. Whatever if medidation can provide such non addicting hallucination, enjoy it buddy !
Lack of scientific evidence does not disprove anything, but at the same time, since we cannot disprove it scientically does not mean that we have to belive in it. Both of them are driven by the fact that we know so little.