We have got into the habit of calling in a doctor for the most trivial diseases. Where there is no regular doctor available, we take the advice of mere quacks. We labour under the fatal delusion that no disease can be cured without medicine. This has been responsible for more mischief to mankind than any other evil. It is of course, necessary that our diseases should be cured, but they cannot be cured by medicines. Not only are medicines merely useless, but at times even positively harmful. For a diseased man to take drugs and medicines would be as foolish as to try to cover up the filth that has accumulated in the inside of the house. The more we cover up the filth, the more rapidly does putrefaction go on. The same is the case with the human body. Illness or disease is only Nature’s warning that filth has accumulated in some portion or other of the body; and it would surely be the part of wisdom to allow Nature to remove the filth, instead of covering it up by the help of medicines. Those who take medicines are really rendering the task of Nature doubly difficult. It is, on the other hand, quite easy for us to help Nature in her task by remembering certain elementary principles, — by fasting, for instance, so that the filth may not accumulate all the more, and by vigorous exercise in the open air, so that some of the filth may escape in the form of perspiration. And the one thing that is supremely necessary is to keep our minds strictly under control.
Source: A Guide to Health by Mahatma Gandhi,
translated by A. Rama Iyer, MA