> If you ever did a dose once you would understand exactly what I'm talking about, it's pretty hard not to understand what's happening once you experience it, just as it is essentially impossible before doing it.

Sorry, that sounds religious. I've experimented with psychedelics quite a bit, I've had very different intense experiences on them that have strongly affected me for long periods of time. That said, psychedelics do not unveil truths to you, not about the universe, not about yourself, but it can absolutely feel like it. You don't discover "why" you're depressed (as if there was a why, and understanding it would magically take the weight off of your shoulders; it's not a Hollywood movie).

That's just mysticism and naive religious interpretation imho.