“One often hears and reads about the dangers of Yoga, particularly of the ill-reputed Kundalini Yoga. The deliberately induced psychotic state, which in certain unstable individuals might easily lead to a real psychosis, is a danger that needs to be taken very seriously indeed.
These things really are dangerous and ought not to be meddled with in our typically Western way. It is a meddling with Fate, which strikes at the very roots of human existence and can let loose a flood of sufferings of which no sane person ever dreamed.
These sufferings correspond to the hellish torments of the chönyid state…” C. G. Jung, Introduction to The Tibetan Book of the Dead *
https://www.yogadangers.com/spiritual-dangers-of-yoga/