1) They are unique, not shared. The idea of a shared, universal
consciousness is that of Hinduism/Advaita, not Buddhist. It is
precisely because each of us have unique alayavijnana, therefore
one can transform or be liberated from the alayavijnana. The Buddha
does not have alaya vijnana, instead he has great mirror wisdom.
However, we (who are still not fully enlightened) have alaya
vijnanas which needs purification. If all of us share one alaya
vijnana, then when Buddha purified his alaya vijnana, we would all
have become simultaneously enlightened which is not the case.
Loppon Namdrol:
Yes, it most certainly is. Moreover, since you are a fan of
Yogacara, you should be aware that while Vasubandhu, for example,
rejects outer objects, he defends the existence of sentient beings
possessing distinct and unique mental
continuums.
In other words, yogacara does not propose that the appearance of
other minds is illusory -- in fact, when you read the Mahāyāna
Samgraha, for example, by Asanga, he shows quite clearly that it is
because of shared traces that we all perceive the same container
world. In other words, for Yogacara, individual minds are real, but
not their appearances.
Glossary (from
http://www.kheper.net/topics/Buddhism/Yogacara_glossary.html):
*Alaya-vijnana,
or "store consciousness" -- one of the central technical terms of
Yogacara
(Vijnanavada, Vijnaptimatra) philosophy of Mahayana Buddhism. Early
Buddhists taught about existence of six-fold consciousness, that is
the conciousness of five types of perception (visual, audial, etc.)
and of "mind" (manovijnana). The Yogacarins
analysing the source of consciousness added two more kinds of
consciousness. They are: klistamanovijnana, or
manas, that is the ego-centre of an empirical personality,
and alaya-vijnana which is the source of other kinds of
consciousness. Alaya-vijnana is above subject-object opposition but
it is not a kind of absolute mind: alaya-vijnana is momentary and
non-substantial. Every sentient being with the corresponding to
this being "objective" world can be reduced to its "own"
alaya-vijnana. Therefore, classical Yogacara states the existence
of many alayas.
The Alaya-vijnana is a receptacle and container of the
so-called "seeds" (bija), or elementary units of past
experiences. These bijas project themselves as an
illusionary world of empirical subjects and corresponding objects.
All other seven types of consciousness are but transformations
(parinama) of alaya-vijnana. In the course of its yogic
practice a Yogacarin must empty alaya-vijnana of its contents. Thus
the Yogacarin puts an end to the tendency of external projections
of alaya-vijnana changing it into non-dual
(advaya) wisdom (jnana) of Enlightened
mind.
2) Mindstreams are non-dual - empty of subject and object
dichotomy, but they are each unique mindstreams, not some universal
shared substratum - the view of Advaita. The idea "I am you and you
are me" is false view. Minds are empty of self and duality but are
relatively distinct and unique.
Here's something relevant, May 2010 entry in my e-book: ...Just
had a conversation with Thusness about this.
He told me that there is a problem of saying more than what is
necessary, and that it comes from a clinging mind. That is,
stripping of 'individuality' and 'personality' becoming a
'Universal Mind' is an extrapolation, a deduction. It is not direct
experience like "in thinking just thoughts", "in perceptions just
perceptions", "in seeing just the seen" - just 'what is'.
Similarly when I experienced 'impersonality', it is just
'impersonality', but it becomes a 'Universal Mind' due to clinging
which prevents seeing. And if I further reinforce this idea, it
becomes a made belief and appears true and real.
Therefore when I said 'impersonality', I am not being blinded as I
am merely describing what I have experienced. This Mind is still an
individual mindstream, and though impersonality leads one to have
the sort of 'Universal Mind' kind of sensation, one must correctly
understand it.
Buddhism never denies this mind stream, it simply denies the
self-view. It denies separation, it denies an observer, a thinker.
It denies a perfect controller, an independent agent. This is what
'Self' means, otherwise why is it a 'Self'? An individual
mindstream remains as an individual mindstream, but it is nothing
related to a Self.
Hence it is important to understand liberation from the right
understanding, otherwise one gets confused. There is the experience
of non-duality, Anatta, 'Tada'
(http://awakeningtoreality.blogspot.com/2010/04/tada.html),
Stainlessness
(http://awakeningtoreality.blogspot.com/2010/04/stainlessness.html),
but these have nothing to do with Self. Hence if one wants to
understand Presence, then one must clearly and correctly understand
Presence...