Concerning the so-called "spiritual" virtues of
the hallucinogens, ... spiritual stimulation should come from turning one's
heart to Bahá'u'lláh, and not through physical means such as drugs and agents.
From the description given in your letter it appears that
hallucinogenic agents are a form of intoxicant. As the friends, including the
youth, are required strictly to abstain from all forms of intoxicants, and are
further expected conscientiously to obey the civil law of their country, it is
obvious that they should refrain from using these drugs.
A very great responsibility for the future peace and well-
being of the world is borne by the youth of today. Let the Bahá'í youth by the
power of the Cause they espouse be the shining example for their companions.
(From a letter dated 15 April 1965 written by the Universal House of Justice to
the National Spiritual Assembly of the United States; The Compilation of
Compilations, vol. I, A Chase and Holy Life)