Thanks for the responses. I'll take a shot at answering your great questions.
willnotcannot:
A first-hand experience with spice will give you a better answer to your questions than I can. Prior to my first experiences, I was an acolyte of Richard Dawkins, and so I was dismissive of anything one might characterize as "mystic" or "spiritual". (Side note, Dawkins has said publicly that he is interested in having a spice experience!). Though admittedly I had recently developed an interest in the Hindu tradition of Advaita, meaning non-duality, which proposes that your true self exists independent of the mind/body. So in that sense I was primed to open up to the idea that consciousness is more than a physical phenomenon.
The visuals are maybe just 10% of the experience. It goes far beyond that.
It's true, the spice can not make you do anything to change yourself or improve your life. But check this out: I believe the two biggest obstacles to an individual's realization of their full potential are (1) irrational fear and (2) laziness. In my experience, the spice has a way of rewarding you for (and helping you with) overcoming those two obstacles, if your intentions are there. I hope you will be able to see this for yourself.
On the topic of dreams: Dreams are, like spice, another phenomenon that we don't yet fully understand. Therefore, I find it fascinating. In fact, I recently started looking into lucid dreaming and astral projection. You spend a third of your life asleep, why not make the most of it?
Enoon:
"Higher dimensions" is just a term that I use because it resonates with me. It might be more accurate to call it "lower dimensions". After all, the physical laws that govern all matter start to break down and lose relevance when we try to apply them to particles at the quantum level, or when particles are moving at a high enough velocity. We already have evidence of matter defying the physical laws that we appear to be bound by, so perhaps this flexibility is related to the seemingly impossible experiences we can have with the spice.
As for the chemical explanation of consciousness, the best answer I can muster is: correlation does not equal causation. Everything in our normal dimension is comprised of a limited number of physical elements. We are no exception. But if our consciousness can exist independent of those physical elements (I'm not saying you accept that premise) then we can explore parts of the universe that we otherwise wouldn't be able to, learn from those experiences and apply the new knowledge to improve our physical lives.
I hope that addresses your question somewhat. We're getting way out of my pay-grade here. This is quite the brain workout.
Pandora:
Thanks for you warm welcome. I can tell there are many folks who have spent more time than I have pondering these difficult questions, and I'm very open to hear new perspectives. I fully believe this molecule has the potential to improve society and our planet as a whole, and I want to help make that happen.