These practices tend to be for magical or religious purposes, such as divination or communicating with gods and spirits.
It’s important to remember, however, that what we see as occultism was the scientific establishment of its day, with exactly the same purpose as modern science – curing human ills and increasing knowledge.
Mesmer was the first to propose a rational basis for the effects of hypnosis.
Although we now know that his notion of “animal magnetism”, transferred from healer to patient through a mysterious etheric fluid, is hopelessly wrong, it was firmly based on scientific ideas current at the time, in particular Isaac Newton’s theories of gravitation.
Nevertheless, the stubborn fact remained that hypnosis worked, and the 19th Century is characterised by individuals seeking to understand and apply its effects.
Recorded history is full of tantalising glimpses of rituals and practices that look very much like hypnosis from a modern perspective, from the “healing passes” of the Hindu Vedas to magical texts from ancient Egypt.At the same time, the nature of “ordinary” consciousness is better understood as a series of trance states that we go into and out of all the time.