What is the difference between the state of deepest contemplation, which the Hindus call nirvikalpa samadhi, and that which they call sahaja samadhi? The first is only a temporary experience, that is it begins and ends but the man actually experiences an uplift of consciousness, he gains a new and higher outlook. But sahaja is continuous unbroken realization that as Overself he always was, is, and shall be. It is not a feeling that something new and higher has been gained. What is the absolute test which distinguishes one condition from the other, since both are awareness of the Overself? In nirvikalpa the ego vanishes but reappears when the ordinary state is resumed: hence it has only been lulled, even though it has been slightly weakened by the process. In sahaja the ego is rooted out once and for all! It not only vanishes, but it cannot reappear.
-- Notebooks Category 25: World-Mind in Individual Mind > Chapter 2: Enlightenment Which Stays > # 139