It is mind that is one of the most important factors for efficiency working in life. If you have clear mind, you may work well than when you are in bad mood. There are several cause that can make your mind unclear mind or can not concentrate, including anger, indolence and anxiety which can cause inefficiency for your work.
One cause of unclear mind is the anger. If you are angry someone or in a bad mood, it normally makes your mind unclear from this bad feeling. Also you may not do well in your work like when you are happy or in normal feeling and your friends might feel uncomfortable with your an