I recently talked about LSD to a spiritual person (the western esotericism kind).
He accidentally took a very high dose in his 20s and also read a bunch of books on the subject for a while, by Leary and so on. He equated it to a trip to the mirror maze, but nothing more. He doesn’t find it worth it and warns against it since for some people it lingers for too long. He is puzzled about people calling the experience „spiritual“ too.