In the end all experience is made up out of one kind of thing which could be called 'matters of which you can be aware', the variety of inter-relations of these (of which you also can be aware) is so great that they form a thick world. But paradoxically, for this to be the case there must also be some thing of which you cannot be aware. If you assume that no-thing-thing is the 'Subject' then you seem to go into an infinite regress of 'aware of aware of aware...', but there is no reason for this assumption. Something like ownership seems rightly associated with this unknown, but that is as far as it goes. An intimation, that stops well short of a 'self'.