The term 'Yoga' comes from 'yoking up' or connecting to God. There are many schools with different forms of yoga. All teachings guide an embodied spirit in a non-personal relationship to God. One of the main teachings of Yoga is that the supreme godhead resides in every being in its heart.
The native yoga-paths are a part of the vedic-culture we refer to today as Hinduism.
Is Yoga an innocent exercise program?
One such experience was of Christina Grof, who, prior to her experimenting with yoga, was an average conservative housewife. During her pregnancy, she, without suspicion, took up yoga to improve her health. She found herself transformed into a New Age Leader. These yoga routines also led to numerous psychic experiences. She became a disciple of the Hindu Guru Muktananda.
Soon, Christina thought that she was going insane.
In the case of kundalini yoga, what normally is thought to be symptoms of mental illness and/or demon possession is 'redefined' by New Age Practitioners as being on the road to 'higher consciousness' or 'enlightenment'. The persons who innocently practice it are taught to not resist this process, but instead to totally surrender themselves to it, because 'it is a part of that ageless wisdom of evolutionary transformation that is far wiser than ourselves.'
Many practicers of yoga report feeling an 'electric sensation' going over their body, and soon after, being visited by a 'Spirit Being'. Visions of becoming one with the Universe, is of course also a part of this process. This is why many Yoga Centers actually provide its users with 'Spiritual Emergency' Facilities, to help when one feels they are becoming terrorized by demonic presences.