Emotions and Desire

Try to categorize the emotions and desires in good or bad, appropriate or inappropriate.  

We have  to establish ethical and moral rules to evaluate desires and emotions, rules that do not always fit the needs of the Limbic System, so we entered the conflict between brain physiology and the rules of society and culture.
 
This clearly is not possible or advisable to satisfy all our desires is necessary to select the incentive we receive from those who are not going to let affect us and which we can not do, this selection process is a highly rational process.