“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-Baha, should be resplendent among the Baha’is, 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, p. 336)