Im a stable, sane, not depressed or anything person. I once took LSD (mixed with other things aswell...) and had a trip during which I spoke to God, Satan and various other imaginary beings. It was not a fun experience - I'm a man of science, but the feeling/perception was so real, my entire world view was shattered. It stuck with me for months after. I've gone from someone who 100% believed in evolution and a materi…
As someone who has also done LSD, I'd agree with this. However, I'd also suggest that shattering a sense of "certainty" and introducing doubt into the mind of someone who previously had certainty isn't necessarily "destroying a healthy mind". What you characterize as a, "crack in my sanity that I can never completely fix", could also be characterized as expanding your awareness. It can be frightening and permanently altering to tear away the facades our psyches have created, since birth, to process and "understand" reality as we perceive it (even temporarily). That's what LSD does. While I also don't consider this a spiritual experience, I do consider it extremely profound. Certainly anyone considering doing LSD should be understand that they are in for an extremely intense and potentially life-changing experience.