Thanks for this Florian.
With regard to "Have you tried to use your old mantra (or some other word) to enter a concentration state?"
To give a bit more detail to the question, I think I'm trying to clarify the type of experience that I and many others had with TM - is it in effect a concentration state? (Regardless of the fact that the main instruction is 'don't concentrate'). I'm considering the possibility that I've had more progress with it than with hte more conventional concentration methods and should give it another whirl.
My experience with it was a bit different from other word-based meditation such as 'In - Out' or 'Bu - dho'. For one thing, the mantras are meaningless and quite musical syllables that (for me) soon become quite subtle. No connection with the body - more like observing a thought as it fades away.
it going on largely on its own (Mind&Body)?[/quote]
Yes - in fact the TM teacher specifically referred to this and I think it's the point of the 'don't concentrate' advice.
Is it hard to keep track of (3C)?
Yes and this was also referenced in the training, that it would come and go, move around, all fine.
Is it mechanically in sync with the breath (A&P)?
No - but cessation of breath is talked about as one of the symptoms of 'transcending'
Does it seem to echo in from all sides like a ragged choir (Dark Night)?
Not in my experience
Does it fuse with other sense impressions (Equanimity)?
Possibly... the whole expereince is somewhat synaesthesic (?) for me - different sensory modalities seem interwoven as light/sound/spaciousness
With regard to limitations: I guess that's a response to my experience which when you think about it wasn't much different from many TM people including the Beatles: Initial enthusiasm, fast results, disillusion, eventually moving onto some other practice. I wonder if this is inherent in the practice itself.