Most people have the dream of sleeping well, because they think that sleeping well is what they want, but when they sleep badly, they think they have a nightmare. How does that happen? Well, it is all caused by the wrong idea of what it means to sleep well. This happens because our brain thinks that sleeping well means that it is time for sleep. In fact, sleep is the time when our body rest and repairs itself. In order to sleep well, we need energy. Energy is what allows your body to maintain vital functions, such as digestion, heart, and immune system. If you feel tired, you should not worry. If your body is exhausted or if it is stressed out, it will need your energy to maintain its vital functions. Energy also keeps your mind at rest , and gives it the feeling that it can keep going. The best way to help the brain to rest, is to increase its energy and energy consumption. That is the reason why a good night's sleep is essential to your health. If you can't get the right sleep, it can make it difficult to wake up, and that may lead to problems later in life.