The bearing on health of these commands relating to the
simple life, hygiene, abstinence from alcohol and opium, etcetera,
is too obvious to call for much comment, although
their vital importance is apt to be greatly underestimated.
Were they to be generally observed, most of the infectious diseases
and a good many others would soon vanish from among
men. The amount of illness caused by neglect of simple hygienic
precautions and by indulgence in alcohol and opium is
prodigious. Moreover, obedience to these commands would
not only affect health, but would have an enormous effect for
good on character and conduct. Alcohol and opium affect a
man’s conscience long before they affect his gait or cause obvious
bodily disease, so that the moral spiritual gain from
abstinence would be even greater than the physical. With regard
to cleanliness, ‘Abdu’l-Bahá says:—“External cleanliness,
although it is but a physical thing, has great influence
upon spirituality. … The fact of having a pure and spotless
body exercises an influence upon the spirit of man.”