Absolute

Adi Shankara was the greatest Hindu theologian (788- 820 ad ?). His system is called Advaita Vedanta (non-dualism, or monism).
Only Brahman(the absolute) is real,Brahman is the only truth. There is ultimately no difference between Brahman and the individual self(atman).

One should live experientially, all of ones life, in order to realize this truth.

But the only renunciation necessary to abtain liberation, is 'inner' renunciation, 'doer-ship' (not a popular idea).
If i am Brahman, then.....

"Yea are Gods,and know it not"
-Jesus of Nazareth