Ramon,

Reproducing deep sleep (theta and/or delta brain wave activity) while being fully conscious is definitely something.  This is Zen meditation at it’s best. Keep us posted on how your experiments are unfolding.   Jeff

Jeff F wrote:

>Many masters have said that "sleep produces yogis every
> night, just not consciously, and that is the difference"

Somewhere on my blog I explain that every night, in deep
sleep, we enter Nirvana, but for the great majority we are not
conscious of being there. For this reason I have looked for ways
to copy some external attribute of deep sleep and settled on the
snore as one way to access at least a taste of this state. Full
how-to description available at:
http://raysender.com/blog-1.html
On the two last postings, 'Sky-pointing tracheal flutter' and
'Some Purring Progress.'

Once you enter the heart chakra, you realize that all mantras
exist there as coverings over the core Self.