The Perfection of Wisdom (III) (prajna-paramita in Mahayana)
Consequently, Nirvana is none other than samsara rightly seen (without the distortion of tanha).
To attain Nirvana is to experience the essential unity of life, the bliss of utter oneness with all things. Opposites are annihilated; time and eternity are two aspects of the same whole.
This understanding of prajna-parimita was most fully developed by one of the greatest Buddhist philosophers, Nargarjuna, who lived in India around 200 CE.