Why is alcohol forbidden in the Bahai Faith ?

“O friends of God! Experience hath shown how much the renouncing of tobacco, wine and opium, giveth health, strength and intellectual enjoyments, penetration of judgment and physical vigor. There exists today a tribe which refrains and abstains from tobacco, alcohol and opium and it completely excels all others in power, in bravery, in health, beauty and grace. A single one of these men can withstand ten men of other tribes, and this hath been universally proved; that is to say, generally, the individuals of this tribe are superior to the individuals of the other tribes.

“Therefore strive that the greatest cleanliness and sanctity, which is the great desire of 'Abdu'l-Bahá, should be resplendent among the Bahá'ís, and that the companions of God should surpass the rest of mankind in all conditions and perfections; that they may be physically and morally superior to others; that through cleanliness and purity, refinement and health, they may be the chief of wise men, and that by their affranchisement, their prudence, and the control of their desires, they may be the princes of the pure, the free and the wise.”

~ Abdu'l-Baha, Baha'i World Faith - Abdu'l-Baha Section, p. 336


‘Abdu'l-Bahá explains that the Aqdas prohibits "both light and strong drinks", and He states that the reason for prohibiting the use of alcoholic drinks is because "alcohol leadeth the mind astray and causeth the weakening of the body".

‘Shoghi Effendi, in letters written on his behalf, states that this prohibition includes not only the consumption of wine but of "everything that deranges the mind", and he clarifies that the use of alcohol is permitted only when it constitutes part of a medical treatment which is implemented "under the advice of a competent and conscientious physician, who may have to prescribe it for the cure of some special ailment".’

~ The Kitab-i-Aqdas, p. 227