Thanks for confirming what many of us agree on regarding the potential of LSD but it is not a research chemical.
Expect a 'most spiritual drug B&D thread' to be overloaded with post mentioning LSD, mushrooms, mescaline and DMT as the classic psychedelics. I'd have to hear a lot more interest to want to support the creation of such a thread, because there are so many nuanced ways to describe things like 'sacred, profound, mystical, spiritual, life-changing, religious, ++++ inducing' etc. They may not mean the exact same but hopefully you see the point where it could get confusing. Tell me, what sacred psychedelics are not spiritual?
If the thread would be created an option would be to only allow mention of research chemicals and/or including a poll listing the typical classic psychedelics and allowing the option 'other... post to explain' for all exceptions.
Personally I agree with 4-AcO-DMT but not 4-HO-MET for spiritual purposes because 4-HO-MET was too recreational and fun for me even at very high doses. It just wouldn't penetrate the veil of the spiritual importance, the profound and ineffable that touches you so deeply you cannot helped but be moved deeply.
DPT is at least as purely spiritual for me as 5-MeO-DMT but so very jarring. The collateral damage of 5-MeO is limited, it being so straight-to-the-point for me, but even though DPT consistently produces a sense of the presence of holiness in me, meanwhile it feels too ravaging. Too high potential for soul rape so to speak.
I also find 2C-T-7 exceptionally entheogenic and entactogenic, so much so that it approaches the therapeutic qualities of mescaline for me. Which I definitely find a spiritual attribute.
Other than these there are remarkably few that intrinsically put me on my knees and demand life-begging respect. Which is not to say they cannot be intense, or even so intense your sanity may be temporarily in question... but that's not quite the same thing, is it. The wonders of the spiritual must be separated from the wondrous adventure and fascination that lies in experience of severe disruption of consciousness.