During medieval times, Maimonides expressed the importance of providing conditions for natural health through diet, exercise and sound mental health.  He said that in spite of your caution and carefulness, you will not be able to prevent minor things from developing in the human body. For example.. be very careful not rush take a medication that is supposed to remove a minor ailment, because if you undertake to medicate these minor conditions, there are two possibilities: Either your act will be erroneous, the opposite of what nature intends, and you will lose and suffer injury, or your action will be correct and you will restore its natural function, but at the same time train your body to lag behind and to do the normal only with outside help.