July 29

It is certain that in this wonderful new age the development of medical science will lead to the doctors’ healing their patients with foods. For the sense of sight, the sense of hearing, of taste, of smell, of touch—all these are discriminative faculties, their purpose being to separate the beneficial from whatever causeth harm. Now, is it possible that man’s sense of smell, the sense that differentiates odours, should find some odour repugnant, and that odour be beneficial to the human body? Absurd! Impossible! In the same way, could the human body, through the faculty of sight—the differentiator among things visible—benefit from gazing upon a revolting mass of excrement? Never! Again, if the sense of taste, likewise a faculty that selecteth and rejecteth, be offended by something, that thing is certainly not beneficial; and if, at the outset, it may yield some advantage, in the long run its harmfulness will be established. 
- ‘Abdu’l-Baha  (‘Selections from the Writings of ‘Abdu’l-Baha’)