Just like machines our body will eventually comes to a breaking point and wear and tear happens. Just like machines, our body tells something that a part of it is having symptoms of wear and tear. Higher cholesterol level, higher blood pressure, frequent stress, insomnia, etc. are some of the symptoms that our body tells us. We neglect this symptoms, eventually part of our body will breakdown which in return gives just illnesses. The only difference to us is that some of our body parts are irreplaceable and a major breakdown simply means the difference between life and death.