Did you say DMT/ayahuasca was one of the ones you've gotten to try? I have an easier time shrugging off LSD or mushrooms as "something that just happens inside the mind," but even then it's a challenge for me. The DMT experience has absolutely slapped that idea in the face, though. At this point, I have an incredibly hard time buying that, whatever it is you see when you take that strange powder, there isn't some cosmic truth to. I've felt distinctly as though it's given me a palpable glimpse into somehting more and more physicists are starting to believe: that time isn't even linear. It blows my mind that such a substance could exist... and endogenously.