Write an English composition of about 120 words with sharing happiness and sadness as the main content.

In our life, happiness and sadness follow us like shadows. Sometimes we are happy. Sometimes we are sad. Sometimes we can't tell happiness from sadness.

What is happiness? In the eternal nature, happiness is a driving force to push the world forward. A happy person has a sound mind and lives a happy life. He takes part in beneficial activities and shares happiness with his colleagues. It can be said that happy people get satisfaction from being kind to others.

Sadness is often self-inflicted. The desire for power increases a person's sadness. The desire for power is inseparable from the desire for fame and fortune. When the desire for power, fame and wealth is out of balance with reality, it will become the source of sadness. In addition, jealousy, revenge and vanity are also sources of sadness. These three evils exist in people's imagination. People are suffering from them unconsciously.

To be happy, one must get rid of the sadness brought by desire and imagination.