True knowledge, intuition and right cognition are the specific attributes needed for a being to get enlightened. Paramahamsa Nithyananda effects this in His disciples through special processes involving initiation, teaching and transforming the disciple to live in a state of Completion, which decreases the number of normal thoughts, and increases clarity and energy.
Opening of the third eye or ajna chakra allows for the expansion of the five koshas (our energy bodies which normally exist in a contracted state due to vyasti (the wrong perception of the existence of individuality). The opening up of cognition through right sakshi (observation) leads to a reversal of the koshas, due to the right cognition of the state of samasti (involving all). This allows the expanded vijnanamaya kosha to cognize the visual perceptions even with blindfolded or closed eyes. Further expansion, as in the case of an adept Yogi would allow the siddhi of parakaya pravesham to manifest, as in the very famous example of Adi Shankaracharya.