Black and white must exist because one signifies lack and the other fullness, between them are other colors that are the mixture of others. Life is like that, because if only the extremes existed then it would be annulled. The basic needs of man have been transformed with the creation of habits that go against our nature and that is the reason why we drink water without being thirsty or eat at certain times without being hungry, or fall into addictions such as tobacco, alcohol or drugs that are a form of unconscious rebellion against everything that should not be.