It doesn't make me ill, but it does absolutely nothing whatsoever for me no matter how many times or how many different ways I give it a go. Meditation, prayer, and all the other stuff where you're supposed to sit still and get something out of it just seemed like autosuggestion to me. I've had enough hallucinogens to know when my brain is off doing its own thing and that's all I've ever gotten out of any of it. Whether it's your Third Eye or some shade arbor revival where you catch the spirit and speak in tongues, all of it seems like fakir's business to me.