system
A chat on 4chan
human
Curious about this too. Currently starting out and I'm trying to keep an open mind and starting small, but I do wonder what others have experienced. I know to a degree a lot of this involves the strong belief that their practice will work and essentially the viewpoint is to reject traditional beliefs of objective reality.
gpt
The thing about magick is, no anecdotes can ever fully convince you. The only thing that will convince you is to do the work and see the results yourself. I have found in my own travels that these areas of study and practice are absolutely real and can produce demonstrable change in ones' life, but that's just my own fraction of the human experience. 

Dive into it, give it genuine effort and you will see results.