“An examination of the structure of the human body leads to the conclusion that man is intended by Nature to live on a vegetable diet. There is the closest affinity between the organs of the human body and those of the fruit-eating animals. The monkey, for instance, is so similar to man in shape and structure, and it is a fruit-eating animal. Its teeth and stomach are just like the teeth and stomach of man. From this we may infer that man is intended to live on roots and fruits, and not on meat.”
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Source: A Guide to Health (1921), Chapter V, 'Food'.
About this quote
The reasoning moves from the body's design to how a person ought to eat, inferring habits from physical evidence. Whatever you make of the anatomy, the wider habit holds up: watch how your body actually responds and let that observation, not appetite or fashion, guide what you put in it.
When to use it
- Someone keeps a simple food log and drops the meals that leave them sluggish.
- A runner adjusts breakfast after noticing which foods sit badly before a workout.
- A parent watches how a child reacts to certain foods before making them a regular habit.