 It is to be hoped that the widespread publicity being given
to the evil effects of smoking, both on smokers and on those who have to
breathe smoke-laden air, will help to convince everyone of the wisdom of
'Abdu'l-Bahá strongly discouraging Bahá'ís from smoking. However, Bahá'ís
must be careful not to go beyond the Teachings in this matter and try to
enforce as a law a matter in which Bahá'u'lláh has deemed it wise to allow
freedom of decision.
It is to be hoped that the widespread publicity being given
to the evil effects of smoking, both on smokers and on those who have to
breathe smoke-laden air, will help to convince everyone of the wisdom of
'Abdu'l-Bahá strongly discouraging Bahá'ís from smoking. However, Bahá'ís
must be careful not to go beyond the Teachings in this matter and try to
enforce as a law a matter in which Bahá'u'lláh has deemed it wise to allow
freedom of decision. 
- The Universal House of Justice  (From a letter dated March
4, 1974, to a National Spiritual Assembly; compilation: Developing Distinctive
Baha’i Communities, NSA of USA, 1998 edition)