"I know", "I do not know", "I both know and do not know", "I
neither know nor do not know", are the four extremes that are
negated by the truth of Emptiness. (existence, non-existence, both,
neither) When "knowingness" is not seen as an entity, then
existence, non existence, both and neither do not apply. Similarly
if "self" or "life" is not seen as an entity, there is no birth
(existence) and death (non existence).
"I know" and "I do not know" are just that.. an illusionary
boundary between existence and non existence, like a line drawn
between waking and sleeping. When we say "I do not know", does the
knowingness belong to "me" or "I"? Nope. To say that "I do not
know" is already a form of knowingness, with the karmic
propensities of "self" as the conditions.
Similarly, mere knowingness is, dependent upon conditions do
they arise. Everything is conditioned arising, but the ignorant
tries to grasp them by imposing illusionary boundaries and views,
thus illusions like the 4 extremes and so on.
Reality has also nothing to do with subjective and objective world.
When we say something like "I do not know", isn't it viewing
reality as an objective and subjective reality? These are again
more boundaries imposed by the mind.
But let's look at Master Tu Shun's teachings. According to him,
every node is a universe itself.
The metaphor of Indra's Jeweled Net is attributed to an ancient
Buddhist named Tu-Shun (557-640 B.C.E.) who asks us to envision a
vast net that:
* at each juncture there lies a jewel;
* each jewel reflects all the other jewels in this cosmic
matrix.
* Every jewel represents an individual life form, atom, cell or
unit of consciousness.
* Each jewel, in turn, is intrinsically and intimately connected to
all the others;
* thus, a change in one gem is reflected in all the others.
This last aspect of the jeweled net is explored in a
question/answer dialog of teacher and student in the Avatamsaka
Sutra. In answer to the question: "how can all these jewels be
considered one jewel?" it is replied: "If you don't believe that
one jewel...is all the jewels...just put a dot on the jewel [in
question]. When one jewel is dotted, there are dots on all the
jewels...Since there are dots on all the jewels...We know that all
the jewels are one jewel" ...".
So there are countless universes and each is interlinked. It is
not in the form of a subjective and objective world. Now if we say
you drop something, it is being reflected in all, and that is what
Master Tu Shun is saying. "I do not know how you feel" is
subjective and objective division. According to Master Tu Shun,
there is no difference. It is a reflection in you and in all, no
difference at all. "I feel" and "you feel" are all nodes
reflecting. There are nodes, but knowing is true. 
