emptiness/awareness has a feeling or presence that sort of radiates in a very subtle way. for this reason it can be said to be non empty emptiness.
when you become aware of your normal awareness then you can begin to analyse it, but as far as rigpa is concerned you already have it. no effort required, this life is it.
what do you see?... rigpa.
what do you feel?... rigpa.
what do you want?... rigpa.
what are you doing?... rigpa.
where are you going?... rigpa.
what is your realisation?... rigpa.
what is awarness?... rigpa.
what is ignorance?... rigpa.
rigpa is your natural state.
all one flavour. ma rigpa is rigpa, only with effort.
best wishes, Tom.
in any matters of importance. dont rely on me. i may not know what i am talking about. take what i say as mere speculation. i am not ordained. nor do i have a formal training. i do believe though that if i am wrong on any point. there are those on this site who i hope will quickly point out my mistakes.