范文:When you're depressed,you may well lose your courage to exert yourself.Once you sink into pessimism,your life will turn to be painful and you will lose everything including yourself.
Actually,a lot of factors contribute to pessimism,not only environment but also the family background,education and so on.
It's contemplated that the pessimism is the cause of despair,illness and failure which can break up your heart very easily.On the contrary,optimism can bring you all you want the best such as happiness,health and success.