Cleanse from your hearts the love of worldly things, from your tongues every remembrance except His remembrance, from your entire being whatsoever may deter you from beholding His face, or may tempt you to follow the promptings of your evil and corrupt inclinations. Let God be your fear, O people, and be ye of them that tread the path of righteousness.

Bahá’u’lláh, Gleanings from the Writings of Bahá’u’lláh, p. 275

Place not thy reliance on thy treasures. Put thy whole confidence in the grace of God, thy Lord. Let Him be thy trust in whatever thou doest, and be of them that have submitted themselves to His Will.   Let Him be thy helper and enrich thyself with His treasures, for with Him are the treasuries of the heavens and of the earth.

Bahá’u’lláh, Gleanings from the Writings of Bahá’u’lláh, p. 234-235

O ye, God's loved ones! Experience hath shown how greatly the renouncing of smoking, of intoxicating drink, and of opium, conduceth to health and vigour, to the expansion and keenness of the mind and to bodily strength. There is today a people [possibly ‘Abdu’l-Bahá was referring to the Sikhs; the description appears to apply to them] who strictly avoid tobacco, intoxicating liquor and opium. This people is far and away superior to the others, for strength and physical courage, for health, beauty and comeliness. A single one of their men can stand up to ten men of another tribe. This hath proved true of the entire people: that is, member for member, each individual of this community is in every respect superior to the individuals of other communities.

‘Abdu’l-Bahá, Selections from the Writings of ‘Abdu’l-Bahá, p. 150

A drug addict or alcoholic should, of course, be told that the taking of drugs and alcohol is strictly forbidden in Bahá’í law, and he will have to do whatever is necessary to break himself of the addiction. You may find it necessary and helpful to put him in touch with organization which specialize in helping such cases. If a case is severe you may have to warn the person that if he does not overcome this problem within a reasonable time you may have to consider depriving him of his voting rights.

Universal House of Justice, Lights of Guidance, p. 74

There is no objection to Bahá’í being members of Alcoholics Anonymous, which is an association that does a great deal of good in assisting alcoholics to overcome their lamentable condition. The sharing of experience which the members undertake does not conflict with the Bahá’í prohibition on the confession of sins; it is more in the nature of the therapeutic relationship between a patient and a psychiatrist.

The Universal House of Justice, 1993 Feb 7, Issues concerning community functioning

Bahá’ís in Recovery Fellowship is a group of Bahá’ís who, as individuals, share a belief in the Bahá’í teachings and the 12-step process (similar to the methods of Alcoholics Anonymous) of recovery from substance addiction. Although “BIRF” is not sponsored by any Bahá’í institution, the National Assembly is aware of its activities and has no objection to individual Bahá’ís working with it. Thus, while the National Assembly does not endorse the ideas or methods of BIRF, it recognizes that individual Bahá’ís and Assemblies may find the services it offers useful in dealing with the problem of substance abuse.

National Spiritual Assembly of the Bahá’ís of the United States to the National Spiritual Assembly of the Bahá’ís of Canada, September 11, 1991