How can you be so sure that he didn't? How can you be so sure that your doubts aren't put there by your desire or culture not to believe in anything you cannot see? There is so much in this world that is unseen and extremely hard to believe. DMT, the Spirit Molecule is an interesting read. I once questioned everything that could not be proven by science. Then I grew and realized that what science knows about our Universe and our Consciousness is actually very, very little. So, I opened my mind to include other possibilities.