... To me it is important to understand the connection between japa which is an object and “I am”. As I do experience, the “me” practicing japa vanishes and some silent apperception of being appears which I am unable to describe. I suppose this is still another subtle object, however I can’t proceed any further. May be Michael will clear up this state of affairs. ...Other than our pure and absolutely non-dual self-consciousness ‘I am’, everything that we experience is ‘still another subtle object’, as Hans rightly calls it.
That is, so long as we experience ourself as an individual (a mind or separate consciousness) who is practising self-attentiveness (trying to know ‘who am I?’), we have not yet experienced ‘I am’ in its absolutely pristine form (because when we do experience it thus our mind will be destroyed forever), so whatever we experience while practising is ‘still another subtle object’ — a subtle thought experienced by a separate thinking consciousness.