Who was Narajuna:
-Narajuna 150-250 A.D., He was a Mahayana philosopher. He used Reduction ad Absurdum(reduce to absurdity)method.
----this method was used to show the contradictions in all concepts and reveal transcendent truth precursor of Zen

Kind of like Atman is Brahman, and
Samsara is Nirvana*

Enlightenment is found in realizing these truths.

*samsara=emptiness and nirvana=emptiness
(words cannot define)