Through seven figures come sensations for a man; there is hearing for sounds, sight for the visible, nostril for smell, tongue for pleasant or unpleasant tastes, mouth for speech, body for touch, passages outwards and inwards for hot or cold breath. Through these come knowledge or lack of it.
All parts of the body which have a function, if used in moderation and exercised in labors in which each is accustomed, become thereby healthy, well developed and age more slowly, but if unused they become liable to disease, defective in growth and age quickly.
Declare the past, diagnose the present, foretell the future; practice these acts. As to diseases, make a habit of two things–to help, or at least to do no harm.
If we could give every individual the right amount of nourishment and exercise, not too little and not too much, we would have found the safest way to health.
