Absence of proof is not proof of absence. - Michael Crichton

"But in theory…"
"When we are dealing with history, theories are worthless," Doniger said with a contemptuous wave. "A theory is only valuable if it has the ability to predict future outcomes. But history is the record of human action—and no theory can predict human action."

I believe the experiences reported in this book are reproducible by anyone who wishes to try.

I went to Africa. You can go to Africa. You may have trouble arranging the time or the money, but everybody has trouble arranging something. I believe you can travel anywhere if you want to badly enough.

And I believe the same is true of inner travel. You don't have to take my word about chakras or healing energy or auras. You can find about them for yourself if you want to. Don't take my word for it.
Be as skeptical as you like.

Find out for yourself.

You know, at times like this one feels, well, perhaps extinct animals should be left extinct.