Thangka showing buddist world view and 
Nagarjuna, 2nd century C.E. (I believe)
or 2nd century BC was "the second Buddha" that
had been prophesied.

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He is considered a pre-eminent logician and epistemologist.
His final position is that no positions are possible.
He is the (as far as I know) view of the Two Truths,
remarkably close to current scientific world view:
i.e., ultimately there is the background luminosity
(yes, that is the word they use),
atoms and the void,  that sort of thing and this
ultimate reality is not describably in words (c.f. Feynmann
if you think you understand quantum mechanics you don't).
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Ultimately nothing can be asserted
BUT RELATIVELY or like say, Wittgenstein or Charles
Sanders Pierce would say, conventionally then you have
the world we experience.  Of course, as the Buddha
observed there is nothing to depend on -- all world views
are relative.  Anyway, conventionally, relatively, beings
exist and they suffer so a being that understands both
the ultimate view and the conventional view will, while
being free of hope and fear him(herself) will have Great
Compassion for beings who experience this relative
reality as ultimate and All Too Real.  They need to
be enlightened, then they can experience equanamity and
not be trapped in cycle of samsara etc.
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Nagarjuna is the one who said samsara and nirvana are the same.
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He also said, along with the Buddha everything we experience is relative,
 with the exception of the glimpse or taste of
ultimate reality one can gain in meditation and
then experience more and more in their daily experience
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He said the one who thinks there is some ultimate
view of the world that holds that relative things are empty of
inherent existence has accomplished nothing, in
otherwords he admonished us about the emptiness of emptiness.  
Which is an admonition most modern day scientists, 
those that are not naive materialists should heed.
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Blah blah blah.  
From Alan Wallace who wrote the
Quantum Mechanics and Buddhism book says that
Wittgenstein's view is Nagarjuna's view 
(although Nagarjuna beat Wittgenstein by almost a millennium).  
Buddhism is dialectical, in that many opinions
are held, Buddha like Wittgenstein thought philosophy's
role was to cure, to show the "fly the way out of the
fly bottle" but ultimately nothing can be asserted.
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the one who thinks there is something called