Nature of enlightenment
No definitive answer can be given to this question. However, a speculative answer may be given.
Advaita Vedanta enlightenment is attained when the mind becomes still.
When the lake of the mind becomes clear and still, man knows himself as he really is, always was, and always will be. He knows that he is the Atman. His 'personality', his mistaken belief in himself as a separate, unique individual, disappears. "Patanjali" is only an outer covering, like a coat or a mask, which he can assume or lay aside as he chooses. Such a man is known as a free, illumined soul.
How to know God The Yoga Aphorisms of Patanjali I.3 Commentary by Swami Prabhavananda and Christopher Isherwood
:"Now I'd like to say more about the fundamental nature of the mind. There is no reason to believe that the innate mind, the very essential luminous nature of awareness, has neural correlates, because it is not physical, not contingent upon the brain. So while agree with neuroscience that gross mental events correlate with brain activity, I also feel that on a more subtle level of consciousness, brain and mind are two separate entities."
Dalai Lama in 'On Luminosity of mind' quoted in 'The Really hard problem meaning in a material world' by Owen Flanagan
It seems comparing the two quotes that Advaita Vedanta enlightenment is achieved when the mind disappears while Buddhist enlightenment is attained when the mind itself becomes luminous.
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