In his bestselling book 'Proof of Heaven,' neurosurgeon Eben Alexander opens up about his own near-death experience -- and how he experienced heaven against all medical odds. Now, Dr. Alexander is talking to Oprah. 'Our brain acts as a filter or veil to affect the memories [of another realm] as we come back into this life,' he tells her in this video. Oprah's 'Super Soul Sunday' conversation with Dr. Alexander will air Sunday, December 2, at 11 a.m. ET on OWN.
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