A lot of people trash their subtle physical body with psychedelic drugs. While they do certainly give you experiences in altered levels of attention, you pay a price for it. They definitely screw up the subtle physical. Hatha Yoga can be good for that.
Frederick LenzAt a certain point I left my spiritual teacher because I began to see the limitations of my teacher, who was a very powerful occultist, but who I thought was, to some extent, limiting others in their spiritual growth.
Frederick Lenz