For in everything that men do the body is useful; and in all uses of the body it is of great importance to be in as high a state of physical efficiency as possible. [6] Why, even in the process of thinking, in which the use of the body seems to be reduced to a minimum, it is matter of common knowledge that grave mistakes may often be traced to bad health. And because the body is in a bad condition, loss of memory, depression, discontent, insanity often assail the mind so violently as to drive whatever