Hypnotism

From Bahai9

Hypnotism (at least as a psychic pseudo-science--see below?) has a weak influence compared to the Kingdom of God

"Hypnotism hath a weak influence over bodies, but hath no result. But the power of the kingdom of God is great. If thou canst, endeavor to obtain a share of that power."

(Tablets of 'Abdu'l-Bahá, Vol. I, p. 169, also in Lights of Guidance, no. 976)

Auto-suggestion or hypnotism practiced by qualified, trustworthy physicians in medical science can be undergone by Baha'is

"What comes under the healing of psychic practices Abdu'l-Baha has warned us against; but any form of auto-suggestion or hypnotism which is used by medical science and by properly qualified physicians we are free to take advantage of, if we feel that the doctor using such practices is qualified and will not abuse his rights."

(From a letter written on behalf of the Guardian to an individual believer, February 15, 1957: Spiritualism and Psychic Phenomena, February 14, 1974, p. 2; quoted in Lights of Guidance, no. 977)

Mesmerism is sheer imagination

"The planets and stars have no spiritual effect in the earthly world, but the parts of the universe which are in endless space are closely connected with each other. This connection produces material effects. Outside of the Bounty of the Holy Spirit all that thou hearest concerning mesmerism or trumpet communications from the dead are sheer imagination."

('Abdu'l-Bahá, Tablet to Ella Goodall Cooper: Daily Lessons Received at Akka, p. 85, 1976 ed., in Lights of Guidance, no. 1761)