Then start meditating, and you too will find it to be true.
There isn't a controversy about it in the group of people that have gotten out there. It is just an accepted fact.

Only atheistic scientists insist that thinking happens in the brain. And so, if we could just download the brain, we could be immortal in a computer. It is a good SF story, but really, memories are stored throughout the body. Your tummy has more neurons then frontal cortex. Your heart really does remember.

Here is the real kicker. Out there, you can have thoughts and ideas that you can't bring back into your body. They are too big. So, when y ou get back in your body, you remember having a huge epiphany, but you really can't remember but a piece of it.