I don't know if this will give you hope or not.
I did encounter a man who had an NDE. Vietnam combat vet. Air Force. Shot down and near death.
It was interesting and odd hearing him.
I mean, he had a very disciplined, very military demeanor. Kind of the last person you would expect to tell you this.
That alone was powerful.
I have to say, that being next to him, when he reported it...while he was saying it, I had zero doubt he was telling the truth.
Only later when my mind was wandering around to where ever it goes, did some doubt come in.
To me it seems like the mind's default position is doubt.
And I think that itself is quite a huge bias.
There are You Tube videos of Eben Alexander. He is a neuroscientist who had an NDE. The scary / interesting thing about him is that he reviewed the medical records and could see that at the time he saw the images of the afterlife, his brain was so filled with inflammation and illness, that it could not have produced the kind of images he saw.
So, that would mean that the images he saw were not produced from the brain.
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I had carbon monoxide poisoning in 2003. I was close to death for 4 months. The first few weeks were horrible. And then, somehow, some peace just came upon me and I just accepted that I was going to pass. After that, things were much easier.
I stopped fighting and just somehow saw death as natural? I don't know that I am describing it all that well. But it was much different than I would have thought about it.