Colloquium on Quantum Phenomena, Consciousness, and Being
The Absolute
The Nature of Reality, the Ultimate Reality, Pure Being, and or
Absolute are indefinable.  Those who define the Nature of Reality,
the Ultimate Reality, Pure Being, or the Absolute are defining a
manifestation in this world or in finer vibrational realms but not the
unmanifest Nature of Reality, the Ultimate Reality, Pure Being, or the
Absolute.  

Nevertheless, the following quote does some justice to the Nature of
Reality, the Ultimate Reality, Pure Being, or the Absolute.  Helena
Petrova Blavatsky, an outstanding clairvoyant and Siddha and the
founder of the Theosophical Society in 1875, expressed the
inexpressible in the following words in
The Secret Doctrine:

    "An Omnipresent, Eternal, Boundless, and Immutable Principle
    on which all speculation is impossible, since it transcends the
    power of human conception.... It is beyond the range and
    reach of thought ... unthinkable and unspeakable."  

Although the Absolute cannot be defined (and is not a principle - the
only unsuitable statement in the quote), its attributes are being
explored by science and its aspects are being experienced by
humans in the laboratory of their own consciousness.  
I know, it doesn't get any more abstract than this, but, folks, someone's got to do it.