Not only can they destroy our cells, but they often may release poisons that can harm our whole being. Cleanliness is one defense against disease. Also, the body creates internal defenses against specific bacteria and viruses. In fact, because the body builds up these defenses, there is a question whether being too clean is actually good for you, because you may then not develop the natural defenses needed to maintain your health. Injury Injury to parts of our body can come from attacks by animals or other people, or they can occur through an accident.
Caution is the best defense against injury.
Carelessness or ignorance often results in injury. Poison Ingesting the wrong material can poison a person. Sometimes poisons are subtle parts of the environment, such as smog or drugs. Being aware of potential poisons is an important defense. Sometimes environmental poisoning is unavoidable, since you may not even realize it is happening to you.